Combing thru parts lookups I've found the difference is in the main jet. 9.9 uses a .056 jet and the 15 uses a .061 jet :) They detuned the 15 in reaction to California restrictions according to a string on another forum.
Further inspection revealed the cam was bolted to the block but doesn't go there. The plates where are identical (same part #). Guessing PO bolted it there to keep up with it when he removed the tiller arm, it was a parts motor I bought for the swivel bracket...
Parts lookup by serial on...
Thanks, blocks are the same other than the mounting method of the shift cam, mine bolts the the throttle/shift plate and the donar directly to the block (same location). I'd planned on using the original jet, easy as it's in the bottom bolt the holds the bowl on.
Doesn't appear to be different. There is a neck down in the center of both and "64" is cast on both at that point on the reed side. Too deep to get a caliper down there but there is a smaller ridge on the air intake side that appears to be the same on both and the diameter of the throat at the...
I've aquired a 92 9.9 HP Mercury as parts motor to replace the frozen tiller tube on my 93 15 HP. This motor came with a newly rebuilt carb (no signs that it's ever seen gas) and I'm curious if they will interchange? Same model and carb bore (34-315 on the butterfly on both) and parts apperar...
While working on the carb on 15 HP mercury the trigger wire dropped out of ?? I've had the flywheel off looking for the location to put it back in and can't locate where it goes. Any help? Also love to get a service manual for it, found a reccomendation scrubbing thru the threads but it's a...
Need a starter recoil spring for a Mercury 10 hp, 1993. The stock spring 42194A2 is NLA and can't find any in stock anywhere. Anyone have any luck with crossreferencing to another that will fit this motor?
Thanks
