Johnson QD-17

[shoestringmariner]

Going to look at a 1956 Johnson QD-17. Anything I should be aware of or look for with these? Owner will let me do a compression test. I’m expecting coils needing replacement & the usual revival stuff…but is there anything else to look for?

[frankr]

Loose wrist pins. Check them while you have the plugs out.

[fleetwin]

OK, this 10hp has the larger 18hp style gearcase, which is a good thing. Ask the owner if you can crack the lower gearlube drain screw to check for water. And, like Frank says, check for loose/sloppy wrist pins. Ask the owner what fuel/oil mixture he is using, if he says 50:1, you might be concerned.
These are pretty solid engines, other than possible wrist pin issues. Be sure to check the normal stuff, look for bent/cracked castings, signs of overheating, etc.

[shoestringmariner]

excellent, thanks much guys!

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