372 advice sought.

[Mick Dempsey]

So, one of my older saws is this 372, hasn’t been out of the workshop for months.

 

I gave the chain a tickle, emptied the fuel out, put some fresh in, off it goes, good as gold. 
Performance is average, I remember it being a ripper for years, now it’s just ok.

 

An exhaust stud has broken requiring retapping so I took the thing apart and noticed this black streaking down the piston.

Does this indicate worn rings? If so I’ll just scrap it, I don’t want to put any more money or time into it if that’s the case.

 

TIA.

Mick

[timbernut]

Hi Mick, if the piston/barrel isn’t scored you’d get away with just replacing the ring at only a few quid, did it to my 560 couple of years ago as piston was slapping a bit, it was used constantly until a couple of weeks ago when it started racing (sucking air into bottom end from round flywheel when warm). Would’ve thought yours worth doing?

[Mick Dempsey]

Cheers, I’ll have a look at the barrel.

[adw]

flex hone the barrel, possible new ring,better air filter maintenance, and get yourself some better two stroke oil.

[Andy2873]

If you decide to scrap it, I might be interested in buying for parts if not too dear.
Cheers

[Mick Dempsey]

Yeah, it’s scrap now I reckon.

 

Postage would kill it I’m afraid.

[spudulike]

Damn, some people give in pretty easy. One of the best 70cc saws produced and it is being dumped. I would fit a new Meteor piston, lightly hone the bore and get another 10-15 years out of it.

I would have done a compression check before tearing it down and if it was 160+ then all is good. 150 and lower then it is time for a new piston. The bottom ends are pretty solid as is the rest of the build. It just needs a bit of a clean.

[Mick Dempsey]

Guilty as charged, soz.

[Gary Prentice]

59 minutes ago, spudulike said:

lightly hone the bore and get another 10-15 years out of it.

 Only a mechanic who actually looked after and regularly serviced a saw would expect that. The rest of us who operate on the principle that fuelling and sharpening are  maintenance tasks,  think we're doing well getting 5+ years from a brand new saw 

[gary112]

3 hours ago, Mick Dempsey said:

Yeah, it’s scrap now I reckon.

 

Postage would kill it I’m afraid.

Too good of a saw to scrap Mick,best Husky made