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Buck 400 (Massimo) trying to turnover but will not start

Jon Simmons

By Jon Simmons
in Massimo UTV SxS Forum

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Jon Simmons Rookie

Jon Simmons

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I was riding my Buck 400 and when going up a slight incline I noticed it dropped in power. Once I reached the top I made a turn and it stalled out. I have not been able to start it. When I looked at air filter the case was about 2 1/2 inches deep in oil and gas and filter was torn. I cleaned it out, replaced spark plug and drained oil. I added leak stop then new oil. It just had head gaskets replaced back in the fall. When I try to crank it, it sounds like it wants to start but it is not getting enough to start up. Does anyone know what could be happening with this UTV? I am stumped! I figured there is a bad seal for the gas/oil mixture to be in reservoir where air filter is. Hopefully leak stop additive will correct that for the time being until I can figure out what is happening. Please help.

Thanks in Advance for your feedback.

Jon Simmons Rookie

Jon Simmons

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60 PSI. I am going to look at spark plug again, fuel injector and take off the cam cover to see if anything looks odd. If I don't see anything then I believe I will run a top end leak down. I hope that I can find the issue but afraid it is the piston and that will be an issue. Afraid if I take engine apart I will not find the parts I need to fix due to being manufactured in China. Lesson learned for me. any suggestions are welcomed. Thanks

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