Redline
Well-Known OPE Member
- Local time
- 7:02 PM
- User ID
- 8067
- Joined
- Dec 7, 2018
- Messages
- 6
- Reaction score
- 10
- Location
- Summerland B.C.
Not chainsaw related but I figure this is where the porters and modders hang. I have a km85 that I rebuilt from a bunch of parts. The whole works. Bearings, seals, rings, new carb, fuel lines and filter, ported, muffler mod, squish 015, timing advance. It 4 strokes with the high turned out almost 2 turns and when I lean it out, it maxes rpm at 10200 and then it seems to hit a limiter in the coil, sounds the same all the way in to likely too lean... Tried 3 different coils, (same pn) and another carb. I mostly use it for formal hedge trimming so more rpms and power are good to have.
Is it a limited coil?
Can I mod the coil somehow?
Anyone know if a different coil might fit? Would an aftermarket coil be unlimited - cheaper to produce?
My other km 85 unit maxes out about the same rpm with a muffler mod and no advance but my hybrid km74 will go way higher. FS 74s are hard to come by these days. Could I put the chainsaw attachment on and tune it in the cut by leaning it past the limiter to max power so it's not running so rich?
Is it a limited coil?
Can I mod the coil somehow?
Anyone know if a different coil might fit? Would an aftermarket coil be unlimited - cheaper to produce?
My other km 85 unit maxes out about the same rpm with a muffler mod and no advance but my hybrid km74 will go way higher. FS 74s are hard to come by these days. Could I put the chainsaw attachment on and tune it in the cut by leaning it past the limiter to max power so it's not running so rich?