Got quite a bit taken apart last night on the 450. Man this saw is dirty and has some corrosion, but the crank and rod bearings look OK. Main bearings have some rust. Next step is pulling the rod and piston.
McCulloch Chain Saws
- Thread starter Bruce Hopf
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Contrary to what has previously been posted, there are only 24 loose needle bearings on the big end of the connecting rod...
Mark
Mark
I was going to say....I started counting and didn't look like a million needles, haha.
Very random question but has anyone used wintergreen oil and rubbing alcohol to soften old, hard rubber parts? I have a few rubber pieces on this saw that are in good shape but hardened beyone being usable (like the cap that goes on the side cover for spark plug access).
Very random question but has anyone used wintergreen oil and rubbing alcohol to soften old, hard rubber parts? I have a few rubber pieces on this saw that are in good shape but hardened beyone being usable (like the cap that goes on the side cover for spark plug access).
I have used gum spirits of turpentine to revive old printer rollers. Not sure if that softened the rubber or just made it sticky, but it worked for several years after treatment.
Rallyeguy
ArboristSite Member
Brake Fluid has been known to improve flexibility of old rubber diaphragms. Soak your hardened rubber parts for a day and see how they are, If it needs more softening, let them soak another day etc...
If all else fails, I believe Max the Mac Man is selling new caps https://maxmacman.com/
Had a chance to mess with the 795...i got a runner. Started right up and idled fine. However, it leaks fuel everywhere. Its coming from under the fuel tank. Im not sure if its a crack or leaking fastener or what. Another day ill take the tank apart and see what is leaking. But the good news is it started up and ran. I let it idle for a few mi utes and revved it a few times but not much due to fuel leaking everywhere and thinking about that.....i was a bit excited and forgot to close off the dsp valve. So likely itll run a bit better next time if i close that. Lol
Well curiosity got to me. Went back out to the garage and i was right. The dsp was not latched down...got a good engine. Haha
Well curiosity got to me. Went back out to the garage and i was right. The dsp was not latched down...got a good engine. Haha
Well guys...ive seen some crazy stuff...this is why my Mac 450 wouldn't turn over. It wasn't a broken ring. It wasn't a bent rod. It wasn't a bad bearing.
It was a pebble. A pebble in the cylinder.
And I've got the thing stripped right down to the cylinder. I didn't realize what was in there until I removed the intake / reed cage and was able to look into the cylinder. And I saw the little bastid hiding in there.
I've got a nice condition complete P&C assembly coming from a salvage place on eBay.
I'm not upset because the main bearings are noisy, and inside the engine is so bad, it never would have survived without a tear down and rebuild.
I've got some work ahead of me...
It was a pebble. A pebble in the cylinder.
And I've got the thing stripped right down to the cylinder. I didn't realize what was in there until I removed the intake / reed cage and was able to look into the cylinder. And I saw the little bastid hiding in there.
I've got a nice condition complete P&C assembly coming from a salvage place on eBay.
I'm not upset because the main bearings are noisy, and inside the engine is so bad, it never would have survived without a tear down and rebuild.
I've got some work ahead of me...
This is driving me crazy. These are posted 30 minutes away for $25 ea. Messaged immediately that I could come right now with cash 2 hours ago. Zero response. It had just been posted so I hope I wasn't late to the party. 
I know the feeling...I missed a deal on an immaculate Homelite 80cc saw about 2 weeks ago, I'm still aggravated about it.
Too many people post things and then sell them but never take the ad down or mark it sold and just choose to rudely not respond to inquiries. I think they should be banned for doing that as it is a complete waste of people's time.
Well i did some investigation into the fuel leaking fuel tank on the 795. Found a tiny hole in the bottom of the tank under the baffle. About the size of a shotgun pellet...#8 bird shot. It should be an easy fix tomorrow. Couple drops of fuel tank sealer should take care of it. Also got all the blue rtv out of there. The 2 small bolts inside the fuel tank were tight. That tiny hole may have saved that saws life. Sure made a mess in a short hurry when i put fuel in it. I can see getting pretty frustrated with a leak like that and just putting it on the shelf. Should be a easy repair and give it another try on saturday.
I was going to say, the fuel leak is almost certainly the reason the saw was abandoned. It's always nice when you find the reason that saw was put on the shelf, and it's not because it seized up.
Grrr I guess I missed out on those 3. Marked as sold finally.
That was too good a deal to last very long... it stinks when you miss out.
I sometimes ask myself, who are these other weirdos out there buying up 60 year old chainsaws?? Haha
I plead the fifth
Other than my 2012 Husqvarna pole saw I think my ''newest'' saw that was used regularly is a late 90's Poulan Pro Super 380 (60cc screamer) bought as new old stock from a local OPE dealer in 2004 - all the others that see occasional to regular use (Mac's,Homie's,Pioneer & a few Poulan's) are from 40 to close to 55 yrs old now.Though most of the ones that are only 40 years old either Dad (a couple) or myself (the rest of them) bought new back in the day.Maybe a little off-topic here, but I'm wondering, those of us that are into vintage chain saws--not just to sit on the shelf, but actually use it once in awhile--same group of folks who are into vintage pick-ups, vintage tractors, vintage motorcycles? Hmmm ...... Could it be ?? Or is it just me?I plead the fifth
Lol, we just hired a new guy at work. He is also an old chainsaw collector. I was told i have some competition now..ha. when he and i end up at the same place the conversation lasts awhile. No competition. Just chatting is all.
Its all old for me. I wonder sometimes if i actually lived long ago cause that stuff is just more fascinating to me. Like i already know how it works. Really makes me wonder at times
I have a few vintage tractors, in addition to my vintage chainsaws.
My road vehicles are all very new. I have no time to keep old cars running. Maybe when I'm retired.
My road vehicles are all very new. I have no time to keep old cars running. Maybe when I'm retired.
My route was motorcycles...1980-82 models. Then i went the old tractors, ferguson to30, mf50, tgose were pricey to fix. Then old chainsaws....much cheaper. I did buy the old chevy but only 1. Im not a car guy. Ill stick to old chainsaws. Still much cheaper.
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