Reverse crankshaft K&B 21

Joern Markset · Jan 26, 2017

Anyone who knows of a reverse crankshaft for K&B 21 outboard?

moparbarn · Jan 26, 2017

12 or 13mm? Either car or aircraft, don't remember which one.....

Joern Markset · Jan 26, 2017

It is for the 21 SS, aircooled golden head.
According to the exploded part view it should be a 13 mm crankshaft

Any help finding the correct partnumber for a crankshaft I can use is highly appreciated.

Actually my engines did not come with the polished muffler, they had same muffler as the 21 SX

moparbarn · Jan 26, 2017

According to MECOA, only in 12mm.

brad nichols · Mar 9, 2017

Try 707 specialties as he is probably the best resource ok K&B outboard parts.

Brad

Joenagy · Mar 9, 2017

I think I have one from McKoy it was for a RC Car do you need one? It will take some digging.

ian thompson · Apr 1, 2017

The new part number is 17-8904. The old part number 8338. MECOA says that they are in process so they may have some sooner or later possibly..

I have a few new 12mm OB crankshafts.. no spare 13mm`s sorry.

Ian

Reverse crankshaft K&B 21

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