Chainsaw Repair

I have a project 2051 I started last year and have struggled trying to get it to run well. It will run...just very lethargic as compared to other 2054's I seen.

At first it was built as a 2051 with a scuffed piston cleaned up with a new ring. It ran..just not right. It got an new Carb..no change. Then top end was swapped for a 2054...yet again no real change. SO, my theory is ignition and timing...so I swapped ignitions, no change...stumped.

Next place I want to look is related to the flywheel and resultant timing because my gut tells me its running like its retarded ignition timing. Slow to rev, no RPM's on top. Stops around 10K and that so lean its not usable. Need to have the low speed cranked out 2 full turns to idle and run while the high speed is almost shut to get even a little top end.

SO this leaves a few option I can think of...
1) partially sheared keyway on the flywheel.
2) Crankshaft keyway location off for a variety of possible reasons ranging from manufacturing to slipped stub in the crankshaft.

WHAT do you guys think?

Another idea. WAG = Both magnets in flywheel still have strong pull?

Since I have a 2051 and worked on all three models 2051 2054 2055 What you have here is AIR leakage end of story, these saws are EXTREME performers with rpms in the 14,000 range. (not 2054) The port timing and cylinder pressures MUST be spot on. They can be very hard to make run right when they leak, but act like other stuff.
They also have twice as many areas for leakage, case cracks are VERY common along casing seams.
Should idle with 1 turn out low high, 1 1/4 max, ignitions are standard E-lux no issues there.

Good power saws, just most were abused and now leak, I speak from experience.

Duane

Ordered the seals................We'll get 'er going!