HELP! 500i UPDATE !

[Funky sawman]

Was this due to damage from external abuse or are they grenading?

Im assuming a combination of both. These are loggers, and hard on sheit

 

[Gary Courtney]

Here is an update. First I want to thank everyone who has given advice and offered help. Carried crank to machinist and he checked it and said it was .0001 ! I put it back together and it spun without any resistance? Do not know that I did anything different but something changed. Pressure tested at 5psi for 6 minutes with no variation. Assembled saw and pumped primer 10 to 15 times and fired 3rd. pull.Let idle for approx. 5 minutes revved a second or two and killed it . Going to put 28" and cut sometimes this week.

 

[Funky sawman]

Here is an update. First I want to thank everyone who has given advice and offered help. Carried crank to machinist and he checked it and said it was .0001 ! I put it back together and it spun without any resistance? Do not know that I did anything different but something changed. Pressure tested at 5psi for 6 minutes with no variation. Assembled saw and pumped primer 10 to 15 times and fired 3rd. pull.Let idle for approx. 5 minutes revved a second or two and killed it . Going to put 28" and cut sometimes this week.

Probably had it bound in the bearings

 

[singinwoodwackr]

Probably had it bound in the bearings

Done that…didn’t quite get the crank completely seated on one side…oops.
Disassemble and redo…problem solved.

 

[Gary Courtney]

Just finished rebuilding a 500i given to me. Replaced seals,bearings,piston and rings,primer bulb. Cylinder was good with a little sanding and scuffing. I carried it out today and cut up a pin-oak a little bit bigger than my 28" bar. I am very impressed with the 500i's responsiveness. I was cautious on the throttle limbing. Bucking the big stuff I let it work for a couple rounds then let it cool for about 30 minutes before getting back to cutting with it. Running 32:1 in it.