MS460 PTO Crank Seal Problems

[jacktheripper]

Any thoughts?

 

[huskihl]

File the high spots down lightly. Bolt threads are always high on older saws

 

[jacktheripper]

There weren't any high spots on the case at all. The cylinder had the corners slightly higher than the middle. I lightly sanded those on a flat surface and re-checked with a straight edge. I just installed the cylinder with Dirko HT and a new base gasket. I also installed different OEM impulse and fuel lines. We'll see about this tomorrow.

 

[jacktheripper]

Ok, so I put it all back together after the jug re-seal and it is running much better. Idles without stopping, idles while turned in all directions. Doesn't sound "gaspy" like it did before. Only small issues are that when turned to the side and righted again, it stutters like the classic 026 fuel puddling issue. It does sound slightly more "gaspy" or lean when tilted upwards. The only rubber on the saw that is not OEM is the intake boot, so I ordered an OEM one. Maybe that will solve the issue. I ran it for about 45 minutes straight, and made a number of cuts in some 20" green pine that I have out back. Nicely 4-stroking in the wood, and recovers back to idle nicely afterwards. I want to spend some more time using this saw before I deem it worthy to sell. But I am feeling better about things.

 

[jacktheripper]

I ran it again tonight and made about 15 more cuts. I took the original carb, punched out the nozzle, and punched in a nozzle from another HD carb that I had in my box. Installed original carb, and it was running even better.

 

[Al Smith]

29 years of workng in an automobile engine plant .There's how it's done . You use a funnell like thing called a "bullet " to expand the seal lip so it gets over the step in the crankshaft .As far as little seals on a chainsaw engine they make them to size but you can easily use something like thin plastic stock rolled into a tube to do the same thing .Use plenty of oil .When I rebuild an engine I fully expect it to blow smoke for about 5 minutes on the first start up ..Fabricate something,a piece of tubing ,deep socket to use as a driver so you don't screw up the seal .You do it correctly it won't leak otherwise it will leak . It's not a race now .As recently as two years ago I got in a hurry installing seals on a Partner p-100 that took me another week to get a new seal to replace one I ham handed and warped the metal not using the correct sized driver .