Over size pistons for fifties 18 OMCs?

[billw]

I have a ’57 18 Johnson that I finally got around to beating apart and assessing. The bottom cylinder just has a little too much rust to hone out. The rest of the motor isn’t too bad; so I started to look for over-size pistons. They don’t seem to be available in the ’57 and ’58 parts lists, on Marineengine.com. This surprised me. What am I missing?

Long live American manufacturing!

[frankr]

Here ya go…..

[Mumbles]

NOS pistons for these motors are getting harder and harder to find. You might have to keep your eye out for a set of good used ones.

[billw]

Thanks very much! Yeah, I know it’s a long shot hoping to find a piston or two; but the search is part of the fun. I think I already have some 20-over rings kicking around somewhere….

Long live American manufacturing!

[fleetwin]

Will keep my eyes open for you…

[bobw]

Bill – I rebuilt a ’57 18hp last year and think I might have a 20-over piston out in the shop. Let me go digging and I’ll get back later tonight.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“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."

[billw]

Working with the original number, I found they superseded to a two-ring style and found some of those in Nicosia, Cyprus. I ordered two, with ring sets, for under $100, delivered. Might be the end of Sept before I get them; but hey, I have about 99 other motors to work on….Thanks again everybody for the help and suggestions.

Long live American manufacturing!

[bobw]

Bill – glad you found what you needed. I searched high and low in my shop and could only find a standard size piston. Thought sure I had a 20-over but sure can’t find it now.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“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."

[frankr]

Nicosia, Cyprus??? Wow, Bill, how did you ever find those? There must be a story behind this.

[Mumbles]

The seller in Cyprus must be seiraesaands.

[Author]

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