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I've seen it mentioned in other first time builder threads, and I thought I'd bring it up here as well... Try a rebuild first, getting the frame perfect is not an easy task. And if the welds aren't perfect your asking for trouble, especially if you're putting big tires and a big motor on...

Spent a bit of time working on this over the weekend, cleaned the carb again replaced all the gaskets and checked the tank and carb. as described above. It still idles stable, and I can open the throttle up and it will hold steady if its not moving. But it still dumps and on occasion shuts off...

So I have similar linkage on mine, however it wasn't getting the job done, so I rigged it with a long spring and attached it to a bolt behind the clutch... It pulls it back much better now than before... Course I still can't get it to hold full throttle consistently but that's another issue.

I think I'd go new, either the Predator or another clone... But only because I've decided I don't have the time (or skills) to tinker with old engines... And they seem to need lots of tinkering. So far I have mostly old engines so maybe I'm bias against them... The one newer engine I have...

Found this link to the service manual, might help... Tecumseh Service Manual

Good luck getting your hands on it, looks like a fun project.

I had the same problem, added a spring from a bolt behind the clutch to the long lever that pulls on the throttle... I'll try and get a pic of mine tonight. Is the governor external on yours?

Looks pretty cool, I dig the shocks... Are those things still considered Go Karts or is that more of a mini-Dune Buggy thing?

So I spent a bit of time messing with the gas cap, didn't really come to any solid conclusions though... I tried it cold, then went to drive it around and warm things up, got to the bottom of the hill and discovered the field on the neighboring hill was on fire... Called the wife and fire...

Interesting. I'll give this a shot tonight and see what happens. I'll check this as well, I have another tank off a different motor that I could hook up as well... might be a dumb question but would a one way air/water valve like those used for airlines in fishtanks work to allow air in and...

Thanks, could it be fluctuating to much? It does it so often that its nearly impossible to use the engine. I have a Subaru 4hp on another Kart that is far more consistent.

So I picked up a tec H35 (45710W) engine a while back with a handful of other engines and an old basic Kart. I'll start with sorry no pics... yet... I'll see what I can do when I get home later. The Engine runs well and I've sorted the idle so its fairly consistent though it does speed up as...