89 25 Hp Johnson Tracker. 25 hp to 30-35 Hp. Conversion. BEEF IT UP pt 2. THIS OLD OUTBOARD
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- čas přidán 30. 05. 2022
- It's This Old Outboard. 1989 Johnson 25 Hp. Beef it Up, Tiller it Out! pt 2.
Was comparing the 25 hp outboards to the 30 hp outboards. Then I noticed
the 30-35's, could not find a difference in any of the part numbers ! What makes a 35 hp a 35? Somebody Please tell Me!
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The last time the 35hp was offered in the sales catalog (in the U.S. at least) was 1984. 1985 and newer sales catalogs do not show a 2-cylinder 35. The most they show is a 30hp in this 31 cubic inch motor series. Everyone says the difference is the hp rating at the flywheel vs. the prop shaft. Not so. The 1984 35 has bridge port intake ports. The 20, 25 and 30 models have finger port intake ports. You can pull the by-pass covers on the block and see the two different types of porting between a 1984 30 and a 1984 35.
Yes, the parts books show a 1985 and newer 35, although I have never seen one. And the blocks show the same part number for the 30 and the 35 in 1985 and up. Those blocks (at least the 30hp) have finger porting. So, if there really is a 1985 and newer 35, then I cannot find any difference either. Perhaps the 35 in those years is the MARS, or military model. Still, I see no difference in part numbers in things pertaining to making more hp.
Every 30 and 35 ('85 and up) block, intake, reed assembly, head, etc. seems the same in the parts books and they are finger ported. In summary, like you, I can see nothing in 1985 and beyond that is different in the parts books between a 30 and a 35. But, in 1984 - and probably earlier - the 35 had bridge port porting. And they will scat!
Talking about carb jetting............ a 1987 30 and a 1988 30 are virtually identical motors. However, if you look at what the high speed jet sizes are, it will amaze you at the difference. 63D in '87 and 70D in '88 Why? Who knows? Maybe they thought the motors were too lean in '87 and causing burned pistons, when actually, it was probably the 100:1 fuel/oil ratio (which was taking it too far). If you find out anything, please let me know. Thanks for the video.
Hey. Thanks for tuning in. And thanks for doing the homework! Its crazy. Stay tuned !
I just learned something, cool video.
Hey. Thanks again for tuning in!
Got my Johnson 28 long shaft out today, new impeller, prop, fuel pump runs like the day I bought it in 92. Ordered carb kit, fuel pump, impeller kit, coils, points and screw clamp cups ( washers ) for the Evinrude 6 i picked up recently.It’s a 71 took carb apart and had a cork float!!! It runs but figure if I’m goin to fix it, do it right.
Hey. Sounds Good! Thanks !
I love ole Johnson Evinrude motors. I have the 40 hp Evinrude runs great it's 1989.
Hey. Thanks for watching & commenting !
Amazing, all the same parts for different engines. The same tooling. Save some serious money on the manufacturing process. Maybe a different crank between them. Nice detective work there mr. Tracy. 😀
Same Crank too! Thanks again !
That Tracker does have the better intake manifold. Add the large venturi carb to get your 30 hp. Simple. Kinda sorta. Check main jet size by inserting a number drill bit if it doesn't want to come out. Bigger ain't always better. Main jet size is determined by reading the spark plugs after a high power run and quick shut down. When the carb is changed the optimum jet size changes. Get a few more ponies by using the higher compression head from an '80 or '81, 35 hp.
Hey. Thanks for tuning in!
I bought my bay skiff knowing it had a blown '06, 25hp, but included in the deal was a 35 with a shucked gearbox. I ran the numbers and it's actually a '94 30hp. I swapped powerheads but after talking to a local owner of a 55 year old marina I tossed the 30 carb in a tote. He said the tuning of the carb is what makes a 30/35 hp and the extra fuel lines from the fuel pump. I used the 30 intake, slightly bigger, 25 carb, 25 fuel pump, the 30 powerpak which is slightly hotter than a 25, and the ol' boy said to use a 72D jet he gave me.
Factory weight on the skiff is 449 lbs, I'm 230, 10 gal bait bucket, 4-5 ol' skool Penn rigs, 18" danforth anchor w/10' of heavy chain, 2 batteries, 12 gal fuel. Pushes that at 31mph all day long. The KW 1720 w/115 hp will only run 42mph, full T-top, 20 gal tank, 5 batteries, 36V spotlock, etc.
Ol' boy aid those 30/35 carbs are terrible to tune and keep tuned, and they'll destroy rod bearings/pistons if not right, kept right.
Hey. Yeah I was wondering about the powerpack, but on this thing the 30-35 are the same and on the 89 25 the p-pack is under the flywheel. I thought that was crazy! So no swapping there. I guess it's a "we'll see" situation. Thanks again !
@@THISOLDOUTBOARD1 The numbers I ran were on the outboard mounting frame for the '94 30hp. The lower unit was bad, part of that mounting frame was broke.
Reason I even asked about the powerpak with the ol' boy was because I was going to use all the external stuff off my original powerhead but the '94 had a temp sensor in the water jacket-next to the thermostat-that ran to the powerpak-'06 25hp didn't. He said to use the powerpak because it was slightly hotter than the 25hp. These powerpaks were both mounted near the back of the exhaust cover plate.
Did you ever go on tin boats forums? There is one heck of a good write up with photos about the differences in the 20 to 35 hp and doing the conversions.
Hey. No, but I've seen it on iboats. Probably the same guys, I even put the links in the description on the first "beef it up" video. I did my 83 25 Evinrude with a 70's 35 carb. Gained a solid 5mph, standard prop, that thing was so sweet my 15' Dura Craft would hydroplane! So I'm gonna do it again ! Hahaha Thanks again !
@@THISOLDOUTBOARD1 Yeh…I put the 30hp carb. and intake on my 20hp..Too fast really for my boat.Prop gaurd slows it down a bit for my boat which is fine.
The intake manifold is what determines engine size, as more air available.
All are a 521 cc engine, with the intake, carburettor and porting the only variations in determining hp.
Thanks for tuning in!
Did the same type of swap, intakes are different on
35 hp ,,, bigger intake hole to match larger bore diameter on larger carb.
Hey. Thanks for watching and commenting. Yeah these are the same diameter and it's funny how it's the same part # for some 25's & 30's. Only way to really know is to take them off and compare. The 30-35's are cut bigger. Thanks again for tuning in!
Edge of my seat bracing myself for for the boat wave jump and then it didn't happen? I did some asking around about the 35 carb a while ago and a mechanic said the difference was the reed valve
Hey. Thanks for watching & commenting !
Hey great post if you need hard to find parts try getting in touch with Pelican Marine Center at Hudson,fl I get parts from him they even mail it to you catch you next time
Thanks !
No wake jumping? Lol. My kids love it when I jump wakes, my back hates it when I do!
Hahaha! Mine too!
The numbers stamped onto the manifolds are the "cast" numbers. Not quite the same as a part number. The difference between a 25 intake and a 30 intake is in how they are milled...but both were cast from the same mold.
Another key difference is the reed valve stops. The 30/35 hp will allow the reeds to open more with longer duration than the 25's. But both will use the same reed leafs.
I'm not sure on this one, but the later model 30's called for smaller orifice than the older 25s...because of improved fuel/oil recirculation. Less waste means more return to the manifold, so less new fuel drawn from the carb.
You should also see a different exhaust tube between the 25 and 30/35. 2-stroke power is a calculated balance between intake and exhaust. Same for 4-stroke, but much more critical in the 2-stroke. If you transfer the reeds, intake, and carb from a 30 to a 25, but leave the exhaust tube the same...you'll lose wide-open-throttle RPM. End result will be a slower motor than the stock 25. HOWEVER with an interesting trade-off: that same mismatch of parts will give you a motor much more durable for prolonged slow-speed trolling. Greater back pressure equals longer life for the rod bearings and crankshaft.
Hey. Thanks for tuning in. Yeah it's crazy but same part numbers for the 89 25 & 93 30 exhaust, reed stops. The only real difference I can see is the bypass cover, like you said, improved circulation. I talk about in the next episode. And I'm on the fence about swapping it. It's a "we'll see" situation. Hahaha Thanks again & stay tuned !
@@THISOLDOUTBOARD1 I wonder if the port size and timing is different also
the 25hp was dyno @ the prop & he 30 was dyno @ the crank. yeah that sun definitely is hard on boats. that's why i keep my cover.
I thought 1981 is when that hp rating was changed.
Hey. Thanks for tuning in. Wouldn't that make the 25 a 28? Thanks again !
I have a 28 Spl. Do you know if the carb/intake swap will work? I’m having a hard time figuring out how the 28 differs from a 25 or 30.
Hey. Thanks for tuning in. What happened is the outboards horse power use to be rated at the powerhead, then they started rating the horse power at the prop. Which it loses a little hp at the prop, so a 30 hp becomes a 28 special or the 90 hp becomes an 88 special. So you have a 30 horse if you go by the powerhead rating. You could try a larger size high speed jet/orifice to get a little more out of it. Thanks again & Stay tuned !
Can you buy the 72d and the 57d separate from the carb? Or would I have to buy a 30hp carb and use them from that?
Yes you can but you'll want to make sure your putting it in the right carb, one with a larger throat or venturi. You can get them at marineengine.com but you'll need to know what carb to look for. For instance a 1975 Johnson 25 hp carb will have a 72D size jet, part no. 0328546. Also you may find them on ebay. Thanks for tuning in!
🏁
Thanks for watching & commenting !
a little off topic, but do you have a video on checking reeds? I have a 80s 25hp johnson that wont go over 5mph. I soaked carb and cleaned out all ports. I watched your video on a similar model and problem about bogging down, but it did not change my situation. Someone told me try looking at reeds and maybe they are stuck or broken, and that could cause the same issue.
Hey. Thanks for tuning in. Just pull the carb off and shine a flashlight in it. They're right there where you can see them, I did it in the video at 10:52. It's rare but it happens, off hand I cant think of a 25 I've ever had with bad reeds. Don't push on them just look! They should be closed/flat, spray some carb or brake cleaner on them. Is this an outboard you just got or did it just start acting up? Bogging can be 15 different things. What may seem like a fuel issue could be an ignition problem and vice versa. Curious to know what you find out. Thanks again & Stay tuned !
@@THISOLDOUTBOARD1 thank you ill try that, sadly im not a mechanic. This was my grandfathers old boat and motor. My brother got it before me and had it worked on. Supposedly it worked great but then he had a kid and let it sit for a year. Well old outboards dont like that very much. It starts right up but as you open up throttle it just bogs down. Ill return a comment when i find out.
@@ssss-lw4gn I know you said you cleaned the carbs. If it's been sitting for a long time that could be the problem. No amount of carb cleaner will do the job. The high speed jet/orifice gets overlooked a lot. It's in the bottom of the fuel bowl. They need to be reamed out, some people use different size guitar strings to clean all the passageways, I use a tool for cleaning welding tips. It comes with all different sizes and is around $6 at the big box stores. If your not familiar with this process check out my carb cleaning vid, "the 2 most important things". If you are familiar with it, never mind. Hahaha thx again & Stay tuned !
I have a 1982 Evinrude 35 I put on my 1652 flat bottom and can't find the WOT timing specs anywhere, looked all over the internet, do any of yall know how many degrees it needs to be set?? I rebuilt the carb and it ran good but after sitting a year I took it out last weekend and noticed it was running rough, I believe I had my throttle linkage out of sync with the cam and carb, I want to make sure my timing isn't off before tuning it back up!! I really appreciate any help finding the timing specs!!
Hey. Best to find an omc service manual specific to your model. Check ebay for a good used one.
@@THISOLDOUTBOARD1 Alrighty, I'll keep an eye out for one, I appreciate it brother. Keep up the awesome videos man!
I have 3 1956 30hp and 1 1959 35hp Johnson’s and 35 is a beast it’s bigger it’s heavier and it’s got different parts but 1984 is the newest Outbord 115hp Evinrude
Hey. Yeah I've got a 63 RX-11 28HP. Looks like a 40. Hahaha I called it "the Beast"!
Still wondering if I could make my 81 into a 30hp .. lol sounds like fun
Sure you can! forums.iboats.com/threads/80s-johnson-evinrude-25hp-to-30-35hp-conversion-with-pics.516146/
Try the special carb screwdriver i love mine
Too late its broken. Thanks !
I have a 1995 Johnson 25hp and I’m wanting to convert it to a 35 hp what do I all need ? I’m lost looking for parts help !!!
Hey. Here is some basic info on what you'll need and how it's done. Thanks
forums.iboats.com/threads/80s-johnson-evinrude-25hp-to-30-35hp-conversion-with-pics.516146/
forums.iboats.com/threads/converting-a-20-hp-johnson-to-35-hp.270183/
if your worried about your stainless prop being stolen paint it... you will need to roughen the surface with sand paper and prime... then paint maybe pink.....
Hahaha! Now Git!
I thIink it's diff reeds and larger (elongated) ports- but just a guess
Hey. Yeah a lot of people think that. Same with most omc's outboards, like my 60 hp Johnson, same powerhead as a 70, but they just beef up the carbs and exhaust to give it the extra HP. Like Leeroy say's a 9.9 is just a de-tuned 15 ! Thanks again Bill & Stay tuned !
Would the intake porting and the cylinder head Compression be different making a 30 and 35 different? Like the old 70 to 75hp johnson/ evinrude outboards. One makes power low to mid range the other at mid to high range yet all the parts are the same. Just thinking.
It was the same part number. ? Thanks for tuning in!
The brass needle pen
Thanks for watching & commenting !
There's a special screwdriver for moving the Jets if you want I will give you the part number
Hey. Thanks I appreciate that but I'm good. Thanks for tuning in!
Some of the omc outboards have lil washers on the reeds, that might be how it’s a 35hp
Hey. Thanks for watching & commenting !
Yeah no problem! I really enjoy all your videos! Them are purdy funny!😂
Got a 1981 25hp johnson just replaced the impeller and all the lower seals, replaced the fuel lines, replaced the fuel filter, rebuilt the carb, replaced the wiring harness, checked the upper crank shaft seal with a little soapy water and didn't observe any leaks, .. it runs .. but when I let off the throttle it knocks a little before it goes to idling again .. I took a video of it .. .. can't figure it out .. maybe it's my spark advance is off ? Idk ..
Hey. Thanks for tuning in. I've had that happen while I was screwing around with the wot stop screw. I had marked its original setting and was test running it at different positions. Never went more than a full turn either way. Just curious to see what it would do. I never noticed any real change but I did get a knock at throttling down. Don't remember which way it was set when it started knocking so I put it back to where it was and left it alone. Thanks again !
@@THISOLDOUTBOARD1 well that screw with the spring on it right below my throttle right? I did the same you suggested .. I moved it a quarter turn in either direction and it is still doing the same ... .. I got 105 on both cylinders and pretty blue, almost white spark .. I checked that.. I'm gonna replace the plugs and see what that does, they are the marine autolite plugs that are in it now, what it came with. (probably not the best plugs) ... I do remember someone saying something about having a hard time finding the right plugs for these years of motors ? They had to use ngk's or something ? Gonna do some research on that... can't remember if I seen that on your show or read it in the i-boats forum.
.... my last engine's were two, 1972 6hp .. one evinrude and the other was a johnson . Those were easy to set the timing on . I just used a feeler gage and changed out the points .. they ran great and perred .. both started at the first or second pull.
@@Rockers1121 Champion L77JC4. Advance Auto Parts and Autozone have them is stock once in a while, or you can get them on ebay. Sometimes those nylon idle screws with the spring just look like they're turning. They have a stainless steel core. When they get messed up I melt them out and put a matching thread screw and a nut on to lock it in place. As you tighten it the cam follower/roller will move down the cam. Loosen it and the roller moves up on the cam. I like to set them just before the roller starts to open the carb butterfly between the two timing marks on the cam. Usually just before the first mark. After you take up the slack you may need to reset the timing at the carb linkage.
Damn buddy .. so I put the exact champion plugs you suggested in ... made a difference! ... but it's still clanking after I let off the throttle. It clank like maybe Two or three times . ... just not sure how to adjust timing without going at wot on the water .. .... not sure I'm even turning the right damn screw lol .. I don't know what the hell I'm doing lol .. .. I got it running .. it didn't even run when I got it .. so I'll call that progress at least?
czcams.com/users/shortsq8WhwaqC6ik?feature=share this is the video of what it's doing
Can you make a 25 into a 30 with jets and advancing the timing?
Yes. forums.iboats.com/threads/80s-johnson-evinrude-25hp-to-30-35hp-conversion-with-pics.516146/
Thankyou. Do you think it’d be a waste to upgrade the carb & keep the stock intake? I found a carb for $100
@@josephn9881 That's a decision you'll have to make! Thanks again & Stay tuned !
@@josephn9881 I did my 83 evinrude without swapping the intake with a 35hp carb and gained a solid 5 mph. Best 25 I've ever had but you have to get the right carb
Full
Thanks for watching & commenting !
Pretty sure the 30 and 35 were the same. The 35 was down graded to a 30 when the government mandated that they measure hp at the prop. Before it was 35 at the crank.
Hey. Thanks for tuning in. Yeah it's crazy!
How do we know what you driving🤣
Thanks for watching & commenting !
Gas was cheaper in the 70’s-that why 🤣🤣🤣
Thanks again !
It's all data
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No it's not you better go check gear ratios there hot rod
Thanks for tuning in! I did !
JUT fill
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