FOUND IT Mac 797

[Darin]

 

[rocketnorton]

need some o that 4 mine.

 

[Darin]

 

[Darin]

 

[jacob j.]

I'm assuming that's a 72" bar.

 

[Darin]

I'm assuming that's a 72" bar.

No it's only 36". Last years snow pack was double this last year. A lot more cool weather this winter.

 

[Darin]

Saw has good power. Still idling high. Gonna take to saw shop tomorrow and vac test. Sounds like crank seals. Bucked up 36" log today and after cut just touch the throttle and it runs up a very high idle.

 

[Darin]

Took Saw to Shop and bearings are shot. Any ideas on where crank bearings can be found for these saws or perhaps a cross reference number for one's that would work? Bout ready to tie a rope to the sumbitch and drop it in the lake.

 

[sawfun]

Took Saw to Shop and bearings are shot. Any ideas on where crank bearings can be found for these saws or perhaps a cross reference number for one's that would work? Bout ready to tie a rope to the sumbitch and drop it in the lake.

Ah yes the joys of vintage saws. Most bearing places should be able to measure or cross reference bearings for those. Get the Japenese rather than chinese if yiu have a choice. EBay has them regularly as 125 bearings and seals are the same.

 

[Darin]

Thanks Don

 

[Darin]

Got new crank bearings and seals installed and the old SOB is still idling high. Shot a squirt of brake clean on the welsh plugs and it idled right down. Needs new ones. Any body got recommendation or part number by chance? Or can I just pull em and jb weld em up?

 

[sawfun]

While you have it down enough to have the crank out, you may want to replace the rings. Sometimes old stamped thin rings can lose tension. I've had an 890 that seemed to loose compression fairly quickly and that was the issue. Your rings have been in a decent running saw so they have not taken a set.

 

[Darin]

There was a new in box oem piston and rings on eBay about a month ago for 20 friggin bucks and I was busy as hell working that day and didn't get a bid in. It sold for 20. It's back together and under a heat lamp tonight. jb welded the welsh plugs. Compression is damn good. Haven't put a tester on it yet but it don't pull easy. Found a 3/8 tip for the 36" Oregon bar and put a 3/8 8pin on. Full skip chisel. Will tune tomorrow and cut a bit. Can't friggin wait.

 

[sawfun]

It'll pull an 8 pin 3/8 nice but not in .404. If you ever go that route I'd stay 7 pin. Even my SDC carbed 101B does not like an 8 pin .404.

 

[Darin]

VICTORIOUS!!!!! Hell of a lot easier to tune without it pulling in extra air from the loose welsh plug. Idles as it should now. Runs good.

 

[Darin]

 

[rocketnorton]

waitin for em cuttin side by side... have yet to do so here. no big wood [that's what she said] lately. put 394 together last wk, too, replacin 2101.

 

[Darin]

waitin for em cuttin side by side... have yet to do so here. no big wood [that's what she said] lately. put 394 together last wk, too, replacin 2101.

I'm burried in snow down here. Easy 4 foot out in the woods. Been cuttin up my damn wood pile to tune em up. 797 vs the 075 is gonna be a kick in the ass. My 075 has a new aftermarket carb I capped the rev limiter and the muffler is straight piped, 8 pin 3/8. I'm caught off guard every time I run it. It is a friggin beast. 797 in the big wood like hot knife thru butter. Gonna punch a trail into a big pine today and make some cuts with the 075, 797, and 2101. Try and get a good video. 394 or 090 might be my next saw...394 is a quick saw.

 

[Darin]

 

[Darin]