Another chainsaw dyno...
- Thread starter Red97
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It has a 346 cylinder on it
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That's one angry 346
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The king of cans
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LOUD
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I only ran it once like that while I was waiting for a new muffler to arrive.
Dieselshawn
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Ran a retired logging 2012 660 Magnum on my machine today.
I didn’t have the dyno at the time when I got the saw. I would’ve tested the saw before I did any work to it.
This saw was almost all in pieces in the logger’s parts box. Just the crank case with the cylinder still on.
They went to 661’s so the 660’s were not needed anymore. So I got the parts for free and assembled the saw back together with parts that were in the box. There was a hacked dual port muffler in the box too
I purchased bolts, clutch, rim, starter dogs, from a buddy that runs a small engine shop.
I noticed by spinning the flywheel, the compression feels low. Inspecting the exhaust port, I find the rings seems to be sticking. (These loggers use TC-W3 two stroke oil, shame on them)
Pulled cylinder, used the rings themselves to clean the grooves out, smeared Yamalube oil on the piston, put the cylinder back on.
Feels much better for compression.
My logging buddy pulled the rope, said saw feels like normal compression, the way it should be.
After several sheared flywheel keys, cleaning up the flywheel taper and crank taper, the flywheel finally stayed in place to run on the machine.
The saw made 5.2 hp at 9,000 rpms.
I didn’t have the dyno at the time when I got the saw. I would’ve tested the saw before I did any work to it.
This saw was almost all in pieces in the logger’s parts box. Just the crank case with the cylinder still on.
They went to 661’s so the 660’s were not needed anymore. So I got the parts for free and assembled the saw back together with parts that were in the box. There was a hacked dual port muffler in the box too
I purchased bolts, clutch, rim, starter dogs, from a buddy that runs a small engine shop.
I noticed by spinning the flywheel, the compression feels low. Inspecting the exhaust port, I find the rings seems to be sticking. (These loggers use TC-W3 two stroke oil, shame on them)
Pulled cylinder, used the rings themselves to clean the grooves out, smeared Yamalube oil on the piston, put the cylinder back on.
Feels much better for compression.
My logging buddy pulled the rope, said saw feels like normal compression, the way it should be.
After several sheared flywheel keys, cleaning up the flywheel taper and crank taper, the flywheel finally stayed in place to run on the machine.
The saw made 5.2 hp at 9,000 rpms.
Dieselshawn
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The beautiful exhaust port of my Mastermind 660. Ran many tanks of good quality oil in it. I’ve never needed to remove the muffler to clean it.
Exhaust port of the logger’s 2012 660 after several years of working every day.
ugghhh!! Terrible burning oil. Stuck rings.
Exhaust port of the logger’s 2012 660 after several years of working every day.
ugghhh!! Terrible burning oil. Stuck rings.
Egg Shooter
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You trying to start another oil thread lol.
Dieselshawn
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It is, but has a pretty decent gap.
Dieselshawn
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Last night a crushed 661 needed just a straightening of the handle, recoil from a parts saw and a quick starting test to verify it still runs.
This saw has a date scribed on it. Jan 1/2020, but ran in the bush for only a few months before a falling tree took revenge on it.
It still runs well.
5.2 hp at 9,000 rpm. Exact same power band as the old 660 that was on here prior.
So that means the 660 is still a healthy retired saw.
Even the pressure gauge read near identical psi through out the rpm range from 12,000 down to 8,000.
This saw has a date scribed on it. Jan 1/2020, but ran in the bush for only a few months before a falling tree took revenge on it.
It still runs well.
5.2 hp at 9,000 rpm. Exact same power band as the old 660 that was on here prior.
So that means the 660 is still a healthy retired saw.
Even the pressure gauge read near identical psi through out the rpm range from 12,000 down to 8,000.
