GX390 | DIY Pt5 | FRUSTRATED NEED HELP! | UTV

[@geraldmpiper]

Nice! The saga continues! Way to stick with it!

[@suburbandiy]

Thanks! Will do! I have a new plan, based on the comments received from Part 4… response has been awesome!

[@nicholasherron9904]

One step closer..

[@suburbandiy]

Thx Nick! Yep… getting closer. We’ve received lots of valuable comments on what to troubleshoot next. Next video coming out soon.

[@ProfessorWeissAlles]

8.2 : 1 Is compression ratio. but I remember seeing around 85-100 psi is good compression for them on the internet. If it is a worn motor I think I have heard around 70psi. So anything above 70 PSI will be okay. Try to see if you can get the compression tester to work? I don't know that compression tester. I have always used a simple compression tester with only a hose that you screw down into the spark plug hole and a pressure gauge that shows PSI By running the starter motor for 5 seconds.

[@suburbandiy]

Awesome… TY! I just recently obtained a compression tester. I was using a leak-down tester in the video… wrong tool for stage. Compression test tomorrow. TY again sir!

[@suburbandiy]

@ProfessorWeissaAlles - Hi Professor, I'm happy to report that the compression is 87.5. Also, we replaced the fuel line... it appears that the in-line fuel filter was restricting fuel flow. We've got the engine operational to the point where we took it out for some desert riding. She''s still not 100%, but for now, we're having fun! New video (FINAL) posting shortly. TY again!

[@ProfessorWeissAlles]

I am very happy to hear that. That is very good compression. Keep the videoes coming. Best regards Professor Weise alles

[@ProfessorWeissAlles]

I still think it's the piston rings. It is not that difficult to take the engine apart to clean the piston rings. And reassemble the engine. You can easily handle that.

[@suburbandiy]

Thx again for the encouragement! I’m going to get on it tomorrow… I have the piston ring compressor set. QUESTION… the piston moves smoothly, it doesn’t seem to burn oil (no smoke), I don’t see any scratches in the cylinder… I can see crosshatching. Are those symptoms (or lack thereof) indicators as to the health of the rings? Either way, I’ll be running a compression test and then go after cleaning the rings… just curious for your thoughts… learning fast.

[@illernpiller]

​@@suburbandiy I guess it could be they the piston rings are installed incorrectly perhaps. They need to be put in in a correct way. And I also think that's the issue.

[@suburbandiy]

On it… TY! I’ll ensure they’re in the correct order. Thx again!