Who's knows a lot about older OMC/LB parts?

Iowa_Hawkeye · Apr 17, 2008

A few years ago I bought a lot of NOS piston rings, and other stuff on ebay. Some of what I have, I have no idea what it fits:

601134 - piston, small normal looking piston. Two wide grooves
601107 - rod for piston above
678425 - piston rings (2) small, and might fit the above piston
678426 - piston rings (2) a little bigger than 678425 and these rings are silver in color
678423 - piston rings (3) this I know will fit a C-74 from a parts list I have. What's weird is that other C-engines call for different rings, even though the piston is the same on all C-series, I believe.
679252 - piston rings (2) -pretty sure this fits D pistons

Love to get some more info on these. I may list some on ebay, but will keep the C and D rings.

I at first I thought maybe the piston and rod was from an old A-series, but those seem to have an odd-shaped piston. Maybe it's for an OMC marine application??

echoman · Apr 17, 2008

Maybe a trimmer piston assembly? Ryan/IDC made a trimmer and Lawn Boy marketed it under their name. I believe it was around 30cc. Is that piston much larger than about 1 1/2 in diameter? Just a thought.

Iowa_Hawkeye · Apr 17, 2008

Sorry no pics. This piston is bigger than that. Also the rod bearings are machined solid bronze - no needle or ball bearings. And based on the packaging, I think the parts are from the 50's to early 70's at the latest.

That's why I figured I had an A-series piston. But those pistons have a huge lump on the head. This one is flat. It's probably valuable to someone if I knew what I had!

echoman · Apr 17, 2008

I'm sure someone will help you get it figured out. Must be quite valuable.

8fh11lb · Aug 24, 2009

Iowa_Hawkeye said:
A few years ago I bought a lot of NOS piston rings, and other stuff on ebay. Some of what I have, I have no idea what it fits:

601134 - piston, small normal looking piston. Two wide grooves
601107 - rod for piston above
678425 - piston rings (2) small, and might fit the above piston
678426 - piston rings (2) a little bigger than 678425 and these rings are silver in color
678423 - piston rings (3) this I know will fit a C-74 from a parts list I have. What's weird is that other C-engines call for different rings, even though the piston is the same on all C-series, I believe.
679252 - piston rings (2) -pretty sure this fits D pistons

Love to get some more info on these. I may list some on ebay, but will keep the C and D rings.

I at first I thought maybe the piston and rod was from an old A-series, but those seem to have an odd-shaped piston. Maybe it's for an OMC marine application??

Is any of this stuff for sale? I am not sure what it is for either. I do have three A series engines that need various parts. Finding stuff is a nightmare.

imaLawnBoyFreak · Aug 24, 2009

Iowa Hawkeye i think that first piston and rings is for an old C10 engine mower. Tgore3 has one of those mowers

Who's knows a lot about older OMC/LB parts?

Iowa_Hawkeye

echoman

Iowa_Hawkeye

echoman

8fh11lb

imaLawnBoyFreak

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