Fuel Pump Installation on a Small Engine
Vložit
- čas přidán 11. 02. 2019
- Eric from OMBWarehouse.com explains how to install a fuel pump on virtually any small engine, as well as drilling a pulse fitting into your valve cover.
www.ombwarehouse.com/walbro-f...
Featured Products
**********************
Walbro fuel pump
www.ombwarehouse.com/walbro-f...
3/16" to 1/4" fuel filter
www.ombwarehouse.com/fuel-fil...
Pulse fitting
www.ombwarehouse.com/pulse-in...
Clone valve cover with fitting
www.ombwarehouse.com/valve-co...
Predator Hemi valve cover with fitting
www.ombwarehouse.com/predator...
Stay in Touch with OMB Warehouse
*************************************
Like us on Facebook: / ombwarehouse
Subscribe to our mailing list: bit.ly/2RUQgdA
Send us questions and video requests: bit.ly/2U1DtTW
![No more vacuum fuel pump problems! GY6 Won’t start: FIX! [PROBLD PULSER UNIT]](/img/n.gif)
Thank you! I was trying to run a pump off of the existing port on the OHV cover. Now I understand why it did not work.
I love you, converting an old jd gator to 18 Bluemax. supper easy except for no fuel. You solved that!
Thank you. Great explanation of the fundamentals! This is the video I needed.
Just the video I needed!!!! Thanks!!!!
Great video, always enjoy them and I know this one is a couple years old but the filter after the pump is no longer legal for racing karts.
Thanks for the great explanation..Alot of videos don't explain in detail what's going on.I understand things a little better now..Thankyou.
Thanks Juan,
We really appreciate the positive feedback! Please let me know if I can do anything for you and I will do my best for you
Informative as always
Great video thanks 👍
Hey bud, out of curiosity, would this work at all if you also had no check valve in your breather going to a catch can. At the same time as I want more fuel pressure, I also wanna eliminate as much of the pressure build-up from the down stroke and the vacuum build-up from the up stroke as possible. I wanna say it should work if using the factory fitting size for the breather bc it should still build some pressure and vacuum bc it not like I’m drilling a 1in hole lol but curious if by removing the check valve if that’ll make the pump pretty much useless. I guess I should explain my goals with my build. For the specific build I’m not going for max power, rather I’m going for max fuel efficiency so I’m throwing everything I’ve learned over the decades of building cars and reducing as many parasitic loses as possible. I should also explain that I’m not using oem rings, rather I’m using total seal gapless rings to increase sealing potential even though the crankcase will have minor pressure/vacuum buildup during the strokes compared to stock. Im explaining that part bc with oem rings, reducing that crankcase pressure/vacuum can result in less than stellar ring sealing causing a power/efficiency drop rather than increase so wanted to get that part out of the way. Long story short, it’s a generator build lol. Thank you for your time bud.
the oem black vacuum line that goes into the cover and connects to the pulse line went bad on mine a while back. I replaced it with a piece of clear 1/4" hose. fits in the cover super snug. no leaks. I noticed the other day when I started it gas going from the pump down the line into the cover. does that mean the pump is bad?
Would this be effective to use a pulse pump on a Honda GX390 pulling from an auxiliary fuel tank? It would have to pull fuel up about 15 inches and then over to the carburetor another 12 inches.
For a Honda gx390 could i use the old oil level sensor port or is there an option for vacuum on the carburetor? Or possibly put a bung on the valve cover?
Thanks for the inspiration Grey goat! Am learning to setup a fuel system ( from carburetor all the way to fuel tank) alone and am struggling. Hope I can get some help from one of the GOATS Greatest Of All Time) engine builders!
Regarding the non Hemi valve cover... can you just remove the one way valve (small circle piece) and install a fitting where the hose was?
Thanks for that I've learnt something cheers
GG You have a LOT more Grey and stickers in your back board from this vid to the pushrod cutting vid. 😅. Thanks for all the help and would love to see you setting push rod length and ensuring we always maintain enough piston/valve clearance in our builds. I just bought a 212 with +.020” rod, .308 cam, flat top piston and stage 5 head milled .063”. Now I’m worried do I buy the Venom 1:1 or can I still get away with the V 1:1.35 roller rockers? Lot of money to risk hitting the top of the piston. Any reference material on how to math the math or the math to ensure it works before buying? 😊
So on a governed 420 the best option is to tap a fitting at the top of the valve cover?
Hey brother I had a quick question if you can help me out I'm going to be building a predator 212 non Hemi 212 predator Governor completely, removed port and Polished head, header, pwk 24mm open no air filter, .0.10 head gasket, 3.308 rod, .310 cam, Billet flywheel, with a 38 tooth rear sprocket on a Doodlebug ............ my question is what size of Springs should I use also what size of clutch also should I upgrade any parts for this setup any other parts any advice would be appreciate👊💯
Have you ever run into one of these pumps pushing too much pressure into your carb? Having issues with my carb overflowing. Pushing fuel past the needle and seat. Tried two different carbs. Cleaned them both. Same issue. Only happened after this install
Try adding a fuel petcock and playing with it a bit
Can you feed the pulse from the OHV cover on a 79cc predator?
The Tillotson uses 1/4 in connects on carbs,..correct ?
Do you have a video of how to tap that hole in the the valve cover to get the pulse ? The proper way to make the hole , size and if you need another tool to make the threading so the fitting grips it ?
No, sorry, I don’t have a video on how to drill and tap a hole.
Hit the hardware store and get a tap and the correct drill bit. They are often sold as a set
Once you have the right tools just drill the hole and tap the threads!
G'day mate ,smithy from Aussie, just a silly question, I brought a cub cadet ,20hp kohler motor on it, the is in a very bad way . When your winding the motor you get a small amount of fuel in the filter, how much pulse is required to deliver fuel to the carbie?
Thanks for the video, very informative,
Thanks smithy
Hi Smithy,
G'day Mate! LOL
The pump only will put out a little pressure when pulling the engine over. The pulse is increased with engine rpms. Once the engine is running, it does not take much of a pulse to get things pumping.
When the piston comes up in the cylinder, the crankcase pressure is negative, or a vacuum, and the piston going down in the cylinder creates positive pressure in the crankcase. This is what creates the pulse.
We can also get the pulse from the intake manifold. The pressure in the intake beyond the throttle blade goes positive and negative with the opening/and closing of the valve.
If the pump is not working properly, it may be due to the gasoline. We have 10% ethanol in our gas here and that tends to make the diaphragm harden in these pumps and the fuel supply is diminished...and time for either a rebuild or a new pump.
Some of the Kohler engines used a mechanical pump and they also suffer from today's fuel.
If you have specific questions, please let me know and I will do my best to help you
Eric...the Gray Goat
Im using a 420cc motor in my boat (mud motor). If I wanted to run an external fuel tank, I'm assuming I would need to install a fuel pump setup like this, correct?
Hello,
I have quite a few boat customers using the Walbro pump just for this situation
www.ombwarehouse.com/walbro-fuel-pump.html
just make sure to run the pulse line as short as possible and the least amount of restrictions in the fuel line.
Please let me know if you have additional questions
Could you run the pulse pump into the valve cover on the side on the hemi? Like where that hose is coming off the side there
No, that’s the breather/check valve. Only lets air out, not in so it will not pulse. You’d need to drill a hole in the top of the valve cover and use the barb as GG did in the video. Or if you removed the governor internally, you can use the governor arm hole, drill and tap that for the barb.
I'm trying to install this. But for the 301cc. And there were no directions in the box
I just stretched my 3/16'' fuel line onto the 1/4'' filter and pump. The particular fuel line i have seems pretty flexable so i went with it. But what i'm trying to figure out is where exactly to mount the fuel pump itself ? The only available stud in the area the pump is resting is the top left blowerhousing stud and i tried to put 1 end of the fuel pump mounting hole onto that stud but the stud isn't long enough to put a nut on it to hold it in place. Is the only other choice i have to buy a top plate ?
There are lots of choices! make a bracket for the pump. Mount it on the frame close to the pulse port. It does not matter where you put it! get creative...or get a longer stud! I would recommend using both mounting points!
Thanks a bunch.
hi can you help with a surging engine? Kawasaki fs600v. New carb, new fuel pump, dont know what else. New plugs, fresh fuel.
Just wandering ,,I have a electric pump that max pressure is 4 psi,,I believe,,,,what would b wrong with a regulator behind that and a gauge,,wandering if it can’t b turned down far enough,,has anyone tried this
Awesome explanation. Could you make a video on how to convert a top mount fuel tank to a separate tank under the steering axe? I haven't found any instructions on what parts I need or how the fuel system works on a predator this is the closest
That would be very hard to do for a specific kart and having a "one size fits all" approach is not the best way to do that anyway. Send me some pics of the kart to Help@OMBWarehouse.com and I will do my best to help you
@@TheGrayGoatGarage thanks for the reply. I mean as an example on these types of engines (predator 212, 224, and clones) which come top mounted.
I'm working on a stock gx340 from a pressure washer into a motorcycle. If you happen to have any tips on them or the P-420s, I enjoy the amount of information you output, and would very much enjoy watching a video on it.
Hi Cal,
the GX340 is a solid engine and a great platform to build on...as well as the Pred 420. The biggest thing we need to pay attention to is the crankshaft on the GX340. Some of the power washers used a tapered crank to mount the pump. There are no clutches for the tapered shafts!
The best thing you can do to any of these engines is open up the intake and exhaust, change the carb jets, and advance the timing. The EPA has these engines choked down and these simple upgrades will allow the engine to perform much better!
What are you wanting to do? better than stock? Performance build? Let me know.
Check that crank! If it is a straight 1" crank then we can plan this out for you
I am also doing a 420 cycle project. 1980 Suzuki 450 is my frame/ Roller. What are you using?
@@TheGrayGoatGarage I was gonna run a jackshaft with my CVT built into it so that I can universally swap the engine faster. Yes my 340 has the crappy tapered shaft, I believe a single sprocket will fit on it squarely.
@@dhippstarr a mudding lawnmower tehe
Do you have to block off the valve cover breather to get the pulse to work? or is there a check valve? Great video , thanks.
Hi Don,
Nope! You do not have to plug off the OEM breather in the valve cover. There is a check valve in there that also allows the added pulse port to be effective. Add your pulse port and filter the stock breather and you will be good!
What size npt fitting?
May be stupid question but can u get to big of pulse pump I have gx160 on kart and put pump I found leaking gas out now
I don’t think your issue is the pump if you have one like us shown in the video.
There are some high capacity pumps for snowmobiles that have dual outlets.
Find out where the leak is and address that
Question i have a 2008 yamaha cygnus nxc 125cc 4 stroke scooter and has efi on motor can I run a vacum pump on it . It normally has an 12v electric pumps.
Yes. That is no problem. You just need to find a pulse port. You can get a pulse from the intake manifold too
Running into a problem, bought an r/c with a Mitsubishi t110 motor. No lines were ran. Has a pulse fuel pump. I've never felt with one and I'm lost as to where the line from the pulse nipple goes to on the motor. Please help. Thank you.
Hi Curtis,
That engine would have come with what we call a "pumper" style carburetor. It has a diaphragm in the carb that pulls the fuel from the tank. Chances are if the carb is in good shape, a pulse pump would not be needed. Those diaphragms get hard with the ethanol in today's fuel and will not pump properly. You may need to rebuild the carb.
If you want me to investigate further, send me an email at HELP@OMBWarehouse.com and include some pics
I had a question sir Can u use pulse pump on regular carburetor with after market filter ?? I tried it and it was spitting gas I do have a dyno cam with billet fly wheel and 26!pound springs Please get back with me been fighting with my bike for day about to pull my hair off I bout two carbs and I just can’t get it HELP!!
Yes, you can use a pulse pump with a stock carb. If the pulse is too strong it can over fill the bowl. You can use an inline valve like this to diminish the pulse www.ombwarehouse.com/inline-fuel-shutoff-valve-fits-briggs-stratton-698183.html. A pump can cause more issues than it solves. If you can gravity feed the carb, a pump is not needed. You can test to see if you have too strong of pulse by disconnecting or clamping the line. Start the engine and slowly release the clamp. Try that before trying the inline valve
When you had that predator 212 hemi valve cover in your hand with the pulse fitting already on it. 3:48 what do you do with the little side hole where the original airbox slid on to?
Sorry I read down further and you had answered that question. A simple tube with small air filter on it with work fine on that hemi breather hole off to the side
I use a small filter on that www.ombwarehouse.com/breather-filter-12mm.html
Im blowing white smoke like a chimney after installing my pulse pump on my 196cc MB200. Have a VM22 Chinesium carb. What's the recommended jet and needle setup? Have a 265 cam, billet rod, flywheel etc....
White smoke is typically and indication of burning oil. Send me a pic of your setup to help@ombwarehouse.com and let’s take a look!
Done. Thank you
Could you make a pulse fitting from the hole the governer gear was using?
If you are referring to the top of the case where the rod came through, yes, you can get a pulse there.
That hole will have a lot of oil mist in the line so make sure the pump is mounted high so the oil does not accumulate in the top of the pump
So you can just use ohv cover as a pulse port source. No need to tap the case?
That is correct.
after installing the pump I can still see air bubbles going to the 3/16 line to the carb. I bypassed the fuel filter and same thing. Any help would be appreciated, thanks
Check for cracks in your fuel lines. If air is there, it has to come from somewhere. If your fuel is coming from the bottom of the tank, that means you have air coming in through a fuel line crack, dried hose on a connection that is sucking air, or a gasket leak on the pump.
Thanks for the reply! I should have updated this , the lines were all new, but you were right on track, the fitting into the gas tank needed a new gasket
Would i still need a fuel pump if my tank is gravity feeding my carb? not sure if the pressure is the same.
If you can get a sufficient supply of fuel by gravity feed, a fuel pump is not required
What's that part called
Does this help with top end WOT rpms when you feel like the top end is leaning out due to fuel delivery issues?
That's exactly why I'm here. I put a 265 cam in a predator 212 and lost alot of top end power. I'm hoping the pulse pump will solve this issue so we can ride our kart again!!
@@pete_knuckles long story short my carb was jetted rich - I dropped the main jet on my 24mm pwk from a 130 to 110 and it rips now 9450+ rpm nuts.
I mounted my pump higher than motor and ran hose up and over but oil still coming out of the breather on pump how do I fix this
Run the pump up higher or find a different pulse point
It is hard for me to know more solutions without pics. Send pics to help@ombwarehouse.com
I put the pulse line from in front of the carburettor with a spacer. I've never seen anyone do this but i thought that this should Work, but there's not much of a pulse at my pump is that the problem or could it be the broken seal of my valve cover?
That is hard for me to visualize
Send me some pics to help@ombwarehouse.com and I will take a look
@@TheGrayGoatGarage done, thanks already for answering
Does the pump open when a positive pressure goes through the line, or a negative pressure "sucks" the bladder open?
Both! The engine creates positive and negative pressure which moves a bladder back and forth pumping fuel through some valves inside
@@TheGrayGoatGarage awesome! Im gonna follow Build Break Repeat and use this as an oil pump to feed a small turbo on my scooter
My mower runs good till it gets hot what would you think it could be
Sorry. I have no idea. It could be the fuel tank vent is plugged and vapor locking. Take the cap off when the mower stops and listen for a “whoosh” noise from the cap. If that is the case, drill a small hole in the cap
What size is the fitting thread wise or does it matter
We like to use 1/8 NPT fittings. Those are tapered fittings that seal as they get tightened.
do you no ware i can get a 212 ghost intake manifold
Do you need the stock one or the angled one? The angled intake is only available in the kit. If you want a straight out manifold this will work for you
www.ombwarehouse.com/475int-mikuni-pz-vm-intake-manifold-for-clone-predator-212.html
I have a clear valve cover with already a hole drilled with a nipple and air filter , can I use that ?
Yes,you can use that no problem!
That’s the best way and cheapest! you don’t need fittings if your line/hose is thick enough just stuff it in! 😎
Can I run a pulse off the vent hole in a clear valve cover?
Sure! Why not? Just be prepared for the clear cover to begin cracking and leaking! They are not very strong and are prone to cracking
where can I get those adapters filters
Hi Ray,
We have the billet air filter adapter here
www.ombwarehouse.com/air-filter-adapter-clone-gx200.html
and the air filter
www.ombwarehouse.com/air-filter-angled.html
Where does the hose coming out of valve cover go to not the one coming from fuel pump or can I just plug it off
That should go to a vent. You still need to vent the crankcase. Never plug that up!
Ok cool but mines coming out out the valve cover I'm sure it's same set up so what kind of things can I run it to so I don't lose oil out of it and what's the make of a power house racing engine I'm sure they designed many
I am installing a pulse fuel pump on a small engine and one thing I didn't hear you say in the video was if you could connect your pulse line for the fuel pump to the crank case breather tube on the engine? Can that be done on a stock engine that is non-ohv? I appreciate any help I can get. Thanks.
Hi Edward,
The stock breather on small engines typically have a valve inside that would not allow the pulse to get to the pump. For the OHV engines, we put the pulse port below that mechanism in the valve cover. What engine do you have? Please let me know and I will help you find the right spot
@@TheGrayGoatGarage Thank you for the fast reply and help. I have a 2005 Briggs 6.5hp vertical shaft engine. The model number of the engine is: 123k12-0134-e1 Currently I have drilled a hole in the stock intake manifold and added an npt fitting with a line connected from it to the pulse on the fuel pump. That does not seem to work.
Hi Edward,
the intake manifold, in my opinion, is the best place to pulse a pump. Nice strong pulse and clean from oil. On that vertical shaft flathead, the only other place I can think of is the oil fill tube...but I am not crazy about that idea!
Let's try and stay with the intake manifold. How far away is the pump from the fitting on the manifold? Shorter is better! Where on the intake did you drill the hole? Do you have the inlet and outlet on the pump correct? What pump are you using?
The only other option I can see in the schematic is to drill and tap the block. You would need to disassemble the engine for that to work! Pics! Send them if you can
@@TheGrayGoatGarage I can probably explain my situation better if I could send pics of the setup. May I contact you via help@ombwarehouse.com?
Absolutely!
Or if you give me your cell number I can send you a text and you can send pics that way too
I have seen videos with the pulse pump with a T peice in the air pipe from the valve cover to the carb... but you say thats not a good place to mount it, but why not?
thanks
Hi Pete,
The stock valve covers have an internal valve to relieve the pressure with air going out only. That is why when we drill a pulse port we need to be below the inner structure of the valve cover to get a good pulse. We get a good positive and negative pressure through the line this way
What is the reason for people using these? Can't get a big enough jet?
Thanks for the video can I ask you something do I need to run a catch can and a pulse pump ??
I just purchased a 212 tilly with a stage 2 my engine came with my top plate and pulse pump ran already just wanted to know should I run a catch can as well
So I want to add a pulse pump to my stock Predator 420. I'm looking at buying the Carb Insulator with vacuum port (rather than taping the engine myself), and buying a pump to pull gas from a stand-alone tank. This is for a pressure washing setup, not for racing. Which pump should I buy with the Carb Insulator?
Any pump will do, also you can buy a plastic piece for the motor that fits with stock motor. It has the pulse barb already on it and you’ll still be able to run stock carb etc .
@@user-hp6sp3qg2q That's what I meant by the "Carb Insulator with vacuum port". They sell it on the OMBWarehouse website. I was just checking on the best type of pump. There is a regular one and a "high output" pump on that website.
We have the Walbro pumps here
www.ombwarehouse.com/walbro-fuel-pump.html
and the insulator with the pulse port
www.ombwarehouse.com/carb-insulator-with-vacuum-port-gx390-predator-301cc-420cc.html
The fitting on the insulator os for 3/16" line and the pump uses 1/4" line. Use this to adapt the two
www.ombwarehouse.com/1-4-to-3-16-fuel-line-reducer.html
@@TheGrayGoatGarage Awesome! Where exactly does the insulator go?
@@TheGrayGoatGarage Also, just put my order in for those parts. Thanks again!
What if you're not getting enough fuel from the fuel pump?
Get a better pump
Hi triple G, I have a question about the fuel pump, when I Xcelerate fuel comes out the top of the pump. What can be causing that?? It's a brand new pump...
Not sure if you're question has been answered already but that shouldn't normally happen it's mostly normal to see oil coming out of the top
So unless I drill out the valve cover I can’t use this ?
I thing he's using the hole from when the governor was removed...
If you still have thr governor then I believe you would get your vacum source from the valve cover or intake
Sir , how would you do this on a 5hp flat head Briggs ? I have one that I would like to remove the governor on and replace with the slid type carb !!
I prefer to take the pulse from the intake manifold on a Briggs 5. Most intake manifolds will have a pulse port. If you are making your own manifold, you can drill and tap the top of the side over for a pulse line. It is cleaner if you can pulse from the intake manifold... no oil in the line!
The Gray Goat Garage thank you very much for the info .
Thanks everyone for watching!
Love your videos man and thanks for all your help
At what point do you start needing a fuel pump? After gov removal, intake, exhaust, and jets? Or after some internal work? That one still looked like a factory carb.
Edit - after a little research its seems its not a good idea to use a fuel pump with a factory carb designed for gravity feed.
Hello,
In most cases a fuel pump is not needed. If you are running extremely high rpms and you feel like the bowl is getting sucked dry, then a fuel pump is needed. Methanol applications need a fuel pump as it takes twice the fuel as a gas setup. If you are using a stock type carb, chances are you don't need one.
Please let me know if you have additional questions
Hi Frank,
Not every engine needs a fuel pump! If you feel like the fuel bowl is emptying out at higher rpm's, then yes. You may get enough fuel by gravity feed alone. Try it without and see what happens. I am not a fan of fixing problems that don't exist! LOL Keep it simple!
Outstanding answer Greybeard
C'mon Frank! Gray GOAT! LOL
Please let me know if I can do anything else for you
@@TheGrayGoatGarage Hello Grey Goat Garage
I'm installing an Isky
Black Mamba cam ( .275 Lift / .246 dur. ) in a 196c.c. BSP engine ,
At what valve spring pressure do you need to
upgrade to Chrome Moly push rods , guide plate & automotive style valve spring keepers ?
Ive been told once you go above #20lb. springs.
I have #18lb. or #20lb.
valve springs ready
to install Just for the break in .
Your input would be Greatly appreciated
Thanks in advance
Do you plug off the breather hole on the hemi valve cover?
No, you need to leave that open and filtered for a vent. The pump will still work fine with that open!
Thanks brother! OMB has been great to me! Got the Wildcat 223 rippin’ in the Ct200U EX!
@@TheGrayGoatGarage could you run the pulse though there on the hemi??
@@hudsonmyers7404 no, you cannot run the pulse line from the stock breather tube. There is a valve in the upper part of the inside of the valve cover that would diminish the pulse. You could remove the inner baffle, but you you still need to vent the engine. Drill and tap a new hole!
@@TheGrayGoatGarage I decided to get a valve cover with the pulse fitting I was gonna get the cover off yalls website but it’s not in stock but it’s okay anyway but thank you for telling me that cause if you didn’t I would’ve done it😂😂😂
Will this work for a gx390
Yes, the same methods apply to the bigger engines. It’s all about getting a good clean pulse and keeping oil minimized in the line. The Walbro pump is sufficient for that engine too
www.ombwarehouse.com/walbro-fuel-pump.html
I’m looking for the easiest way to do a pulse pump for my gx390 also. Valve cover seems easier. Will that work for the 390??
What about the older style
Ummm…”older style” what?
Has anyone ever tried using a pulse pump to move oil?
Yes works fine
Great video Grey Goat...your thee man! Have a couple questions..I am putting a 212cc tillotson hemi in my minibike with a 24mm mikuni flat slide card..I was wondering which pulse pump that you sell do you recommend? The reason I am running a pulse pump is that I am also going to add nitrous and was told it would be better to run richer ...thank you so much for your videos...my young son says your thee man as well!
You never showed the hookup of the fuel pump please make another video doing that please make it a close up video
Thank you Ray. I have more videos planned! Stay tuned
You can also email me at HELP@OMBWarehouse.com if you need some help
Never showed the pump hooked up, no close ups, got a real good look at your arm though.........
You're beautiful buddy!
3/16=0.1875.....0.1875x25.4=4.7625mm...I'm gonna go out on a limb and bet it's 5mm fuel line like most other metric engines, not "weird 3/16 inch line" like claimed
3/16” is the commonly accepted fuel line for these engines. That is all I use on my engines and never had any issues
You told us nothing You Need an Outline! I wanted to see running the tubes. Less talk more action
This is a bad video. Move the camera closer.
Thanks for the input. As a one man show, it is hard for me to get different focus on the camera. Please link me to your videos so I can see how it is supposed to be done
I wasnt trying to be an asshole. Maybe get a tripod and add a second camera. Then in the edit you can switch cameras. One close and one widen