Mercruiser Engine Couplers

I am looking for the bolt pattern separation 1.750 between each other for it to fit on my rebuilt 1975 350 5.7 liter OMC chevy engine. The new engine has a bigger 6 bolt pattern than the engine that was in the boat and I bought a new fly wheel that fits but the old fly wheel and coupler won't fit the new engine so I am seeking the search for a new coupler to fit this application.

perfect fit now i can keep the coupler and splines greased

Excellent product and value. iBoats service is outstanding.

Excellent value and service.

...now I can grease the slip joint without removing the drive....perfect fit,arrived "the" day promised...and we are back on the water !!

Works great. Perfect match. Had no issues and pricing was right.

Take your time and do your research. Count the splines. The splines seem to be a bit shorter with the counter bored end but it fit great otherwise.

Well satisfied with this replacement part.

Excellent product, rapid service and receipt of part. Would reccomend you to anyone needing parts or other boat supplies

good price, fast service

I am a 20 year Machinist, Machine Builder. After checking your product I find the coupler flywheel to spline alignment to be 2 to 3 degrees off. Making it impossible for proper spline to gimble bearing alignment. I would like my money back or a good coupler as I know this will build heat and probably fail. Please reply as soon as possible. Sincerely, Duane Fagnan