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By ToughLuck
I have a 2021 Massimo MXU 1000. Last winter the front drive shaft sheared off inside the motor and it was cheaper to buy a new motor than to take it apart in order to remove the front drive shaft that was broken inside the case…
Now it is running rich, seems to maybe be geared too high, does not accelerate well once you hit about 28mph. I’ve replaced the O2 sensor. MAF is next (I accidentally ordered the wrong one, but when I removed the old one you can clearly smell fuel).
I’m not a motorhead but I can turn a wrench. Any ideas how to get this motor optimized? The motor has about 300 miles on it. I broke it in as recommended in the manual.
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By CapnWalleye
Just picked up a Hisun 500 that had shift issues (corroded fan gear) which I fixed. It also didn't seem to be running smoothly then all of a sudden it got worse. It seems to miss on both idle and when pushing the gas pedal to the floor and doesn't seem to be running at full power. I've been working with a local person who is walking me through some steps, but I'd like some input from this group as well. What I've done:
- drained the fuel tank and replaced it with 93 octane fuel and added heet to help with any water problems.
- replaced the fuel injector.
- disconnected the battery (several times) to allow the module to reset.
- set the valve clearance, both intake and exhaust, within specs ... intake was tight but exhaust seemed fine.
- replaced the battery.
- replaced the O2 sensor.
Nothing has helped. Not sure what the next steps are, but would appreciate any expertise that can be offered here.
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By CapnWalleye
Just picked up a Cub Cadet 500 that had shift issues (corroded fan gear) which I fixed. It also didn't seem to be running smoothly then all of a sudden it got worse. It seems to miss on both idle and when pushing the gas pedal to the floor and doesn't seem to be running at full power. I've been working with a local person who is walking me through some steps, but I'd like some input from this group as well. What I've done:
- drained the fuel tank and replaced it with 93 octane fuel and added heet to help with any water problems.
- replaced the fuel injector.
- disconnected the battery (several times) to allow the module to reset.
- set the valve clearance, both intake and exhaust, within specs ... intake was tight but exhaust seemed fine.
- replaced the battery.
- replaced the O2 sensor.
Nothing has helped. Not sure what the next steps are, but would appreciate any expertise that can be offered here.
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By Homeowner A
Have a Coleman UTV 400 that cranks, runs, drives well until it gets warm and is put under load. Light throttle or full throttle it doesn't bog, but it will cut out mid throttle if you move the pedal quicker than it seems to like for example when you're getting ready to go up a hill, but if you immediately floor it, it will do just fine and not cut out. It's random if and when it's going to do it, but is consistent in that it happens only when hot/full operating temperature. I've replaced the injector twice, same with the spark plug and tried different heat ranges (NGK 7,8 and 8 iridium), replaced the fuel pump, adjusted the valves, checked air filter which is like new, changed the oil, replaced the fuel filter. No check engine light. I don't have a code reader for this. Initially I thought it might have a head or head gasket issue as when I got it, the oil was over full, very runny like water milky and it was smoking. I've changed the oil since then twice to clear and clean everything out, and it seems to be good. Coolant stays the same level and so does oil with no changes in consistency or need for adding more. Had I think 7-9 miles when I got it and now has about 77. What should I try or consider next?
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By Jim Kessell
2005 American Landmaster
EH65 Subaru Robins
spits fuel from breather hose into the air cleaner and then down into carb. What’s causing this ??
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