Johnson FD-11 powerhead on FD-10

[Scott Becker]

Hello,

I want to replace a stuck 15hp FD-10 powerhead with a good 18hp FD-11 powerhead on the FD-10 driveshaft casing. Can I use the FD-10 magneto, flywheel and carburetor on the FD-11 powerhead?

Thanks!

[JACQUES]

so question… what is stuck on your FD10 ..gear case, powerhead innards  stuck rings only , rewind starter …etc…

 

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[Scott Becker]

The powerhead. Tried to unstuck a number of times, no luck.

[Bob Wight]

My Johnson common parts book says the FD-10 and FD-11 share the same part number on the flywheel but the magneto plate and carburetor have different part numbers between the 2 motors.   Not sure if that really means those parts are actually different from motor to the other or just a revised part number.   I can’t imagine the magneto plate would really be different between the two, especially since they share a common flywheel.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

[JACQUES]

took me a whole  week to free up a $50  9.5hp  9622a  by removng the cyl head, soaking the rings and  alternately wacking the cyl tops with a round 1 incnch  wood peg.   Suddenly movement began with the FW  moving a few degrees  progressing to a full release. Became a great troller along side  my 75 ETEC

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[Don]

I can understand the different carb, but the different mag plate is intriguing.  I’m wondering if the original 15hp mag plate number supercedes to the 18hp mag plate.

[wedgie]

Check if the base gasket matches to start.

[Author]

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