This gokart is a Trail Master mini xrx with a 5.5 horsepower which has No identifying engine name. I’m assuming a Honda replica.
I’ve posted 2-3 times already and still need help with a gokart. Son in law bought it about 3 yrs. Ago. They broke the axle and they threw into a utility trailor. Thought I would fix it for them so im going to try to get everything in sequence here what I’ve done. I’ve tried posting pictures before but the file is always to big and I don’t know how to resize them.
I got it home and cleaned it up some all around, I bought a new axle, chains, air filter cover, and eventually bought a new carburetor.
When I first got it running with new axle, original carburetor, chains and air cleaner top, I had disassembled the carburetor and cleaned it well. I had cleaned the gas tank well also. I had it idling several times but when I would try to accelerate the motor gently with the gokart on stands wheels off the ground it would labor knock loudly like 2 times and go dead. This happened 3-4 times so I decided to go back further and check the spark and air gap.
I removed the flywheel and the half moon keyway looked perfect, I cleaned the flywheel magnets and the coil . I set the air gap at .020. I checked the valves and pulled the pushrods they looked straight, reassembled the lifters setting intake on .004 and exhaust on .006. I checked the spark plug and made sure it was gapped correctly. I’ve laid the plug on the side of the motor and turned it over and I see good spark going on.
With my Snap On compression tester I’m only showing 30 psi. Someone here said a compression tester would not show accurately on this engine. I removed the old carburetor again and it was deteriorating inside, so I ordered a new carb. The same as the original and installed it.
Now with valves set, air gap at flywheel set, spark plug gap set, and new carburetor it will not start. Fuel filter is freely flowing. I’ve dipped spark plug in gas and tried it and it doesn’t hit. I’ve removed the 10 mm screw at bottom of the carb. and gas is running out well.
Could a compression release be causing me problems. I have no experience with a compression release. When I set valve clearance I removed the spark plug and inserted a thin screw driver down to the piston and rotated the engine to where both valves were open and piston at top. The valves were loose. I rotated again and with the piston up the next time at least one of the valves was tight. I rotated the engine again with piston at the top and both the valves were open, this is where I did the valve adjusting at.
I’ve had it running previously maybe two weeks before but after ordering carburetor there was a week or so delay before now. Now with all clearances rechecked and set and a good new carburetor, air cleaner, fresh clean gas, good fuel flow I’m not getting it to start.
Initially he paid about $1400, I’ve put about $160 in it and lots of cleaning, inspecting everything. Is it time to quit on it, buy a new motor? Any ideas to what I’m overlooking or doing wrong? Thanks to anyone who can help and thank you to everyone who has responded before. Today Harbor Freight has a 25% off coupon with today the last day to use it. I’m thinking of buying a 6.5 engine, don’t know what I should do.
I’ve posted 2-3 times already and still need help with a gokart. Son in law bought it about 3 yrs. Ago. They broke the axle and they threw into a utility trailor. Thought I would fix it for them so im going to try to get everything in sequence here what I’ve done. I’ve tried posting pictures before but the file is always to big and I don’t know how to resize them.
I got it home and cleaned it up some all around, I bought a new axle, chains, air filter cover, and eventually bought a new carburetor.
When I first got it running with new axle, original carburetor, chains and air cleaner top, I had disassembled the carburetor and cleaned it well. I had cleaned the gas tank well also. I had it idling several times but when I would try to accelerate the motor gently with the gokart on stands wheels off the ground it would labor knock loudly like 2 times and go dead. This happened 3-4 times so I decided to go back further and check the spark and air gap.
I removed the flywheel and the half moon keyway looked perfect, I cleaned the flywheel magnets and the coil . I set the air gap at .020. I checked the valves and pulled the pushrods they looked straight, reassembled the lifters setting intake on .004 and exhaust on .006. I checked the spark plug and made sure it was gapped correctly. I’ve laid the plug on the side of the motor and turned it over and I see good spark going on.
With my Snap On compression tester I’m only showing 30 psi. Someone here said a compression tester would not show accurately on this engine. I removed the old carburetor again and it was deteriorating inside, so I ordered a new carb. The same as the original and installed it.
Now with valves set, air gap at flywheel set, spark plug gap set, and new carburetor it will not start. Fuel filter is freely flowing. I’ve dipped spark plug in gas and tried it and it doesn’t hit. I’ve removed the 10 mm screw at bottom of the carb. and gas is running out well.
Could a compression release be causing me problems. I have no experience with a compression release. When I set valve clearance I removed the spark plug and inserted a thin screw driver down to the piston and rotated the engine to where both valves were open and piston at top. The valves were loose. I rotated again and with the piston up the next time at least one of the valves was tight. I rotated the engine again with piston at the top and both the valves were open, this is where I did the valve adjusting at.
I’ve had it running previously maybe two weeks before but after ordering carburetor there was a week or so delay before now. Now with all clearances rechecked and set and a good new carburetor, air cleaner, fresh clean gas, good fuel flow I’m not getting it to start.
Initially he paid about $1400, I’ve put about $160 in it and lots of cleaning, inspecting everything. Is it time to quit on it, buy a new motor? Any ideas to what I’m overlooking or doing wrong? Thanks to anyone who can help and thank you to everyone who has responded before. Today Harbor Freight has a 25% off coupon with today the last day to use it. I’m thinking of buying a 6.5 engine, don’t know what I should do.
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