Seized Engine

[Sawyer Rob]

I used Liquid Wrench for many years and liked it, and then tried Kroil and it seemed to work better for me, so I stayed.

It just could be that it depends on what metal its being used on to pick the winner too.

SR

 

[dodge man]

It’s possible it wouldn’t start years ago because it was locked up, as in thrown rod, dropped valve etc. it won’t hurt to try, it looks like it cleaned up pretty good.

 

[PearlWhiteGT]

Do you have a borescope available to do a peek down the lightening hole?

I do not have one.

 

[TractorTYMe]

I would start taking the head off, even if you have an upper end failure as long as crank and rod is solid, it is easy enough to rebuild with new parts from E-bay.

 

[PearlWhiteGT]

It’s possible it wouldn’t start years ago because it was locked up, as in thrown rod, dropped valve etc. it won’t hurt to try, it looks like it cleaned up pretty good.

This is something I'm thinking as well. Maybe it locked up when he tried starting it and that's why the solenoid was making a clicking sound.

 

[PearlWhiteGT]

I would start taking the head off, even if you have an upper end failure as long as crank and rod is solid, it is easy enough to rebuild with new parts from E-bay.

I might try removing the head if I can't get it free after a couple of weeks. Just limited on space and time at the moment.

 

[PearlWhiteGT]

Well I gave it another go. I couldn’t move it with just the ratchet and socket so stuck a breaker bar in there and gave it a few taps in both directions with a mallet and it broke loose. I can now spin it over.

Should I fill the cylinder with some PB blaster and let it sit for a couple of days before draining the oil and putting in new oil? Or is there something else I should do? Any other steps to take with it before trying to actually crank it over?

 

[plastikosmd]

Personally I like magic mystery oil
Cover piston let it sit
I would have typically removed head to give a light scrub to the piston walls where rings stuck

Sometimes they run
Sometimes they don’t last long

 

[jjeff]

Sweet ATV and it was free! I've seen older junk non running ATVs sold for up to 1k or at least asking that much. Having replaced ATV parts over the years they are pricey. Yamaha holds there value well and are pretty durable in my experience. Imo If you have some know how it's worth putting some time and parts in it Worst case if you have the time part it out. I need to find neighbors like yours lol.

 

[TractorTYMe]

Yeah, let it sit for a few days with MM, then turn it over with sparkplug out, change the oil and filter and sparkplug. Check fuel delivery if it looks clean and working. Maybe take carb off and clean the bowl and all orifices. Then send it.