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1994 125hp ELPTO - weird issue

Seanfish

Member
Finally getting this dialed in.

All runs ok except between 2200 and 3500 RPM or so. Motor bucks on the transom. Almost seems like a misfire with the engine bucking on the transom.

However, push throttle past that point up to around 4000 and jumps right on plane.

WOT is ~4700, which is because I am yet to dial in the right prop

Recent changes - switch box (OEM) and stator (CDI)

Idle is fine, above 3800 is fine, its just that odd range. I certainly expect an inability to run the motor between 1800-2200 due to the lower cylinders kicking in.

Any idea on what would cause something like this?
 
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