RC CAR Carburetor Repair - WALBRO WT
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- čas přidán 25. 08. 2024
- In today’s video we’ll be repair and rebuilding the Walbro WT Carburettor! These carbys can be found on many RC models, from the MECATECH FW01 RC CAR don’t forget the FG EVO and the FG MINI haha even Helicopters, Scooters, Chainsaws, Weed Eaters, Baja’s, Rovans and Garden Equipment - YOU NAME IT it more than likely has a Walbro Carburettor!!
Don’t be tossing aside those old carbs because they’re giving you trouble, rebuild them! its super cheap!
The kit I used on the Walbro WT 603 Carby is K20-wat this kit suits a lot of different models too…
Nice job Mark. thank you! This step by step video was essential for a WalBro Carb rebuild on a 25 year old VARIO ALOUETTE II 1:6 scale RC helicopter. I’m now Celebrating with a smooth idling engine after …… well…… 10 pulls. What a difference! Idling like never before. Side note: As I didn’t have profi punch tools needed for refitting the Welsh washers (?), I used similar sized hex drivers….. with success! I did struggle with the smaller copper fitting … mine did not come out as easily as yours. Beware. Flying this coming weekend. Regards from Switzerland
in my opinion one of the best, accurate, detailed, diy carby rebuilt and explanation video, by a long shot. well done!
i keep coming back to this video just so i don't forget anything on my carb rebuilds.
great job Mr Mark and thanks
Mark this has been the best Walbro carb rebuild I have seen, it really helped my own rebuild. Great job.
Hola. Saludos desde chile. An pasado años desde que hiciste este video. Pero te agradesco igual. Me estás ayudando a entender este nuevo mundo RC 1/5. Saludos y muchas gracias
Loved the info you gave us in this video. Taking the time to explain everything pertaining to the functionality, which is very important to having a running work on carb in the end. Finally I got to see behind those welsh plugs. Thank You.
Please do the bearing video! Dimensions for the tool as well. Thanks Mark
Hey Mark. Nothing but boring is the video. It is awesome. Great pro work again my friend. It is by far the best video for carbs. You are the leader. Keep going man.
Thanks George! I thought for sure it would have been too boring for everyone! Mate its winter here now, wish I could be over there racing in the sun with you boys!!
NICE 1 SIMPLE SIMPLICITY 💚💛❤️🤜🤛
Not long winded at all. This was a great video. Thank you for your time.
Good work. You explained the workings of the carby really well.
Awesome. Good video. Pls let me know which bearings I need for wt603b. I will start rebuilding 10 carbs which bit I need to bore out carb bearing hokes
Thanks Mark. Keen on the bearing video as well.
Excellent video. Great advise for things to check when your carburetor performance goes south.
Thanks Legend!! really appreciate the support!
Very clear, thank you
Mark thank you so much !! The best explained carb function ever :) I am repairing my old chainsaw and I now finally understand how these small carbs work! Cheers , Z.
Fantastic video. Thanks so much Mark.
20:55 just in case everyone wasn’t paying attention this is the critical moment in the video where we learn how to address a lean/rich carb AND CORRECT IT without the official Walbro W tool
Can you make some more videos please? These are great, best on CZcams. We need more.
Bro you got one of them peaky Blinders haircuts cool lol
You are a legend for these videos, do you happen to have a video on how to bearing mod a carb?
You are a legend mate love your videos and yes I really want to see your bearing videos I have some old carbs that have so much slop👍
Hahaha thanks for the support legend!! really appropriate the questions and feedback!
Did ever do a bearing video for the carbs.
Great job bro!
Thank you Sir. Awesome work video on explanation of carb work! 👍👍👍
Comprehensive explanation dude
Thank you
Hi, great video, good work,
Very good video best yet!
Thanks Mark for this nice explained video about the carburator overhaul action! Will share the link ;)
Thanks Mate!! really appropriate the support (and great videos too! your track looks mint 👌)
Extremely good explained! I feel like an expert now😀👊
yes please on doing a bearing video .
Great video!! Any update on the carb bearing mod video? Looking to do the bearing when I rebuild my carb
Carburettor quality wall bro quality Elisa.sir..RS
Thank you for all the info. Awesome to a newbie
Id like to see the bearing mod done.. Step by step... Bearing sizes and tooling used... Thanks for the vids, I've learnt heaps..
very good video I'm looking now to understand better to make a perfect adjustment of the carburetor and explain the features of the high and low of the needles how to adjust for start and end of acceleration thank you very much
Just found this, awesome, any word on when the bearing mod video will be up. I have a small lathe and mill so I think I can certainly start doing that on a carb I am about to rebuild
Great channel! Hope it grows!
You filled a great niche, your instructional videos on RC motors (I'm into GoPeds) exists nowhere on this platform other than on Derek Short's channel. Although he will always be leagend your vids are so much more clear and we'll edited.
Mate this is an awesome video. Great work
Thanks so much for the support, really appreciate it!
Hello great video you bought either the bit or the cutter for the bearings in the carburetor thank you
Thanks for the video,very helpful. But i have a question. What drill did you have for drilling out the bearings. Partnumber of link would be very nice. Best regards
Thanks bro rovan was nat starting tune, but nat as u explain 🤔
Loved the video. Had to share it :).
@EV TEK thanks legend!! and thanks for the share! are you running anything on-road?
Great video
Question my car seems to be shooting a lot of gas out the carburetor and it won't stay running any suggestions?
Great video bud👍👊🏻💥💪
Thanks Legend, really appreciate the inspiration 👊👌
Have you stopped doing videos ? not seen any new ones lately . would like to see carb bearing mod
Hello. could you give my walbro wt668 a review ?? I really like the improvement of the bearing on the throttle shaft, just with that, my carburetor would last a lifetime, hehe.
What size rotabroach were u using mark
Solid explanation of carb workings etc
Have u thought about doing the metering mod where essentially u take about 3 coils from each side of the metering spring to bring the pop of pressure down to 16psi
Regards
Brilliant video, would love to see one on a 990 and the bearing mod too! The small welch plug in your carb doesn't seem to be present in mine, I whacked it a few times and it's solid.
do put a bearing both side
Great video!thank you!
Hope you can help me.
If i pump my primer bulb air goes out but no fuel comes inside .
I already changed all gaskets and diaphrams and screen with walbro rebuild kit and used air compressor in every hole.
Should i try to remove the welch plug??
Thank you
Gday Mark best video on CZcams explaining the carby... and believe me I have watched thousands.
Would you have a part number for the milling bit you used and are they 5x9x4 bearings wouldn’t mind giving the bearing mod a crack.
Keep the videos coming👍
Thanks James! I thought for sure no one would be interested! so glad the info came in handy. The bearings are 3/16 - 5/16 - 1/8 (ID - OD - width) the bit you saw in the video I made in the workshop! after I get the latest video wrapped up I'll be doing a video on three different DIY at home methods for installing the bearings! so keep an eye out... And thanks for the support Mate!!
Mark Thomasson Thanks will do.
On the carb which is the inlet and which is the outlet?
What size bearings and what size cutting tool did you use for the bearing mod?
I am rebuilding a Zenoah 230RC1 for my Gasser Helicopter, and i knew nothing about these engines, but your great videos are helping in the extreme, keep it up, and can you do on on tuning? P.S. i love the music you chose!
I can't find the repair kit for the walbro 998. Where can I find it? I live in Brazil
Mark great video! I need help with someting you did not cover though.I got a used old weed trimmer with a carb. almost exactly like yours, however under the primer there no orange ring like yours. Is that something that should there? I can't get it to prime?
Awesome thanks
Thanks for the support mate!!
Great video, thanks! I have same car, CY 24cc when I got it, it started up immediately. Then it was sitting on the shelf for few weeks before going to the track. There it just did not want to pump fuel and barely get it going. Now I rebuild the carburettor, pressure tested it and it is ok. But the motor still wont run. L needle is 1,25-1,5 turns. I managed to get it going for few seconds if I remove fuel intake line. Motor has spark, carb does not have a choke. Can you give an idea what to do?
hi, any chance of the bearing size and drill used great video 👌
the bearings from 3/16 x 5/16 x 1/8 to drill is 5/16.... thanks
Hey i did all the steps but mu primer bulb is not holding in the gas
What does it mean if you try to lean the low side of the carby and it doesn’t raise the idle??? Ever time I try to do it it does the opposite
Hey Mark! awesome video on how to fix carbs! iw bin looking after a drillbit like the one you used for the bearings. can you tell more about it? maybee were to get one.
Hey Mate, the bit you saw in the video I made in the workshop! after I get the latest video wrapped up I'll be doing a video on three different DIY at home methods for installing the bearings! so keep an eye out... those bearings on the throttle shaft make such a difference!
👌
So how do you do the pop of spring mod on your carbs
The spring rarely needs altering in cars, boats that run around at full throttle can benefit greatly tho. Walbro actually sell springs in different rates!
Hey mark where do you get the bearings from for the walbro carburetor
Nice one Mark.
Only 30 more subscribers till you get 200!
So amazing isn't it!!! it wouldn't happen without the love and support of people like you RC Girl!
I realize this video is a little long in the tooth now... But I've only just come across it and its FANTASTIC Mark!!! ONE QUESTION THOUGH ... How do you rate the Walbro rip-offs (clones!?)???... Obviously - one would (should?) rebuild a GENUINE Walbro if they had to choose... BUT... would a rebuilt CLONE give you just as good service/life expectancy??? OR... do you think rebuilding a CLONE would be a waste of a Carby Kit?? (From your experience???)
im buying 2 fake carb kits for a real Walbro 997 and a fake RuiXing 997. Upon tearing both carbs down i cant see much difference. build quality seems identical. in fact the fake carb uses metal nipples wheras the walbro uses plastic.
What drill bit do you use ? mm size
Can you explain the differences in the 603-668-990
133levi
668 carb used up to 26cc engine and has manual choke
990 carb used on bigger engines up to about 30 cc. Maybe 32 cc. Has no choke
I’m fairly certain this is correct but someone might be able to confirm
very nice video can you tell watt drill do you use to make the hole for the bearing?
miguel ferreira it’s called a reamer
I like the details of the carb workings. BUT, for a $12 carb (new) vs $5 for a carb kit, isn't it better or more cost effective to go with a new carb? My 5 year old (on a shelf for 5 years!) Redcat xt, that I've had 3 weeks, the carb was junk from the factory. I replaced it with a new $12 (USA) carb from Amazon, & it runs like a new, broke in 100cc engine now. LOL! It had some carb issues, factory.
because your new $12 carb is a fake clone carb by RuiXing etc and not a geuine Walbro carb. Mark doesnt buy $5 carb kits either. He buys genuine Walbro. Everyone has a different budget, nothing wrong with that. Also judging by the views there is appetite to learn and service items even in a disposable society. Hows the Redcat?
What size bearing did you use ?
What a Thing. Why the gasoline carb has to be so much more complikated than a Nitro carb?
crankshaft vacuum is sucking fuel into the nitro carb, and at the same time exhaust has a pressure line into the tank pushing fuel. Gas engine has none of this, he explained one port from engine to pressurise the carb with pulses that draw the fuel in
Hi Mark, great video on rebuilding the carbs. Already purchased some rebuild kits for my WT-990 carbs, but finding it hard to find a supplier for the the shaft and butterfly in Oz, where did you get your from?
Good to hear you're having a crack at rebuilding them mate!! Hobbies Direct have them in stock and express post for those like me who hate waiting for parts!
hobbiesdirect.com.au/Zenoah-Walbro-Carburetor-Throttle-Shaft-Kit-T207081370?search=walbro%20carby
let me know how you go...
Mark Thomasson
Hi Mark, thanks for the info on the shaft supplier. Will keep you updated.
Were did you buy that drill bit from and what’s the bearing size you used
@George Specs - I'll detail and show 3 different methods in an upcoming video! it'll cover a couple of different options!
Hi mark i have a hpi savage octane, with a walbro carb and when i accelerate the engine get bogged and dies ive messed with the high and low speed needles but i havent had any luck any ideas?
@Isaac Estrada start with the simple things first... 1. check the fuel delivery, the clunk in the tank might be blocked - disconnect the fuel line on the carby and blow back down the line (just use your breath) the filter / clunk might be blocked.
2. pull the mixture screws out and check the ends for damage
3. reset the mixture screws to default
4. check the vent hole on the metering side (I detail it in the video, fuel metering side)
5. haha if that hasn't fixed the problem, you better order a rebuild kit!
If you have any more questions DM me on instagram - 76thomassonm
@@MarkThomasson76 thank you for the reply, I actually concluded that it was the engine I ordered a new piston ring and sleeve hopefully that'll do the trick thank you
I find it’s that non serviceable check valve that renders most of my carbs scrap
It’s a pretty amazing little one way valve setup! Haha I don’t even really understand how they work?? Walbro should make them removable. Actually have you seen the new Mecatech carb?? Wonder what their doing for a one way? Check it out, looks AMAZING $500aud tho!!!!!!!!!!!!!!!!!!!!!!
ANY CHANCE YOU CAN HOOK ME UP WITH 1 OF THEM DRILL BITS PLZ 😁🤜🤛
Please
who doin that crap, new carb is 25€
You should have listed a link for the bearing , sometimes it's not easy to find the bearing