What is the valve setting on 5.5 hp. GoKart engine. I’ve read it’s a “Chonda” engine. I can’t get it to start. Read somewhere spark plug at .020 and air gap with business card. And valves at .004 intake, .006 exhaust. I can’t get any compression gauge reading with my snap-on tester. Two weeks ago it would start and idle but to try to advance the engine speed it would labor knock loudly twice and go dead. Would restart 2-3 times with same result. Help
2021 trailmaster xrx 5.5 hp. Valve setting
- Thread starter rls8836
- Start date
Denny
Canned Monster
Compression testers don’t work on industrial engines because of the compression releases. Looks like you got all the specs right.
Why would it not start? If airgap is ok, valves ok, spark plug gap ok. This thing set up outside about 1 1/-2 yrs. The girls broke the axle and it was parked. I replaced axle and cleaned the carb real good and replaced the fuel shut off. I removed the gas tank and really cleaned it also. It seems to be getting gas flow while retaining the old fuel filter. When I removed the flywheel to clean it inside and out the keyway was still tight on the crankshaft but it fit real well reinstalling the flywheel with no slack. Do you suppose it’s out of time a little bit? I am thinking of going ahead and replacing the key stock just to rule that out. It won’t even hit dipping the sparkplug in gas and installing it into the head
Denny
Canned Monster
The rings may have rusted and seized in the grooves in the piston preventing a good seal. Try putting 1/2 teaspoon of oil in the spark plug hole and starting it with some starting fluid.
Thank you Denny, do you agree on my valve settings in my post?
Denny
Canned Monster
Yes!
bob58o
SuckSqueezeBangBlow
I’m too lazy to look for a camshaft to inspect the compression release mechanism. And too medicated to picture how it works.
At low rpm, I think it bumps the exhaust lifter.
At high rpm, the centrifugal force
(really its inertia… Like me on the couch after an entire pizza, objects at rest want to remain there)
overcomes the force of the spring and (some weighted thing) swings out of the way so it no longer bumps the lifter.
I think I’ve read somewhere that you can get a compression reading by spinning the engine backwards.
I’m not sure about this. Would spinning the engine backwards keep the compression release from bumping the lifter?
At low rpm, I think it bumps the exhaust lifter.
At high rpm, the centrifugal force
(really its inertia… Like me on the couch after an entire pizza, objects at rest want to remain there)
overcomes the force of the spring and (some weighted thing) swings out of the way so it no longer bumps the lifter.
I think I’ve read somewhere that you can get a compression reading by spinning the engine backwards.
I’m not sure about this. Would spinning the engine backwards keep the compression release from bumping the lifter?