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spudulike

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Been working on two more MS200s -full refurbs plus a 357XP that needed a new cylinder, fortunately had a scrapper with a good cylinder. All is now good and all are running well.

 

Had a KM55 in with a bad coil - tried aftermarket but it is backfiring like it has been on beans for a week:blushing: Checked the flywheel key and that is fine so all I can put it down to is the coil isnt right.

 

I have noticed that most coils line up with the flywheel magnets at around TDC or circa 25deg before TDC, This unit has this happening well after tdc so expect the aftermarket coil is triggering after TDC causing the backfiring issue.

 

Now have an OEM coil on order and hopefully this will sort the issue!

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Been working on two more MS200s -full refurbs plus a 357XP that needed a new cylinder, fortunately had a scrapper with a good cylinder. All is now good and all are running well.

 

Had a KM55 in with a bad coil - tried aftermarket but it is backfiring like it has been on beans for a week:blushing: Checked the flywheel key and that is fine so all I can put it down to is the coil isnt right.

 

I have noticed that most coils line up with the flywheel magnets at around TDC or circa 25deg before TDC, This unit has this happening well after tdc so expect the aftermarket coil is triggering after TDC causing the backfiring issue.

 

Now have an OEM coil on order and hopefully this will sort the issue!

I know on the fs55/km55 ignition coils spud theres about 3 different coils used dependant on age and then the fs56/km56 uses a different one again.

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