I have an old 3.5 marine engine........I need help

[chrisu617]

I bought a boat with a 3.5 inboard from an old co-worker. I got no manuals, only the information he could give me through experience of playing with the boat for a couple of years. I unfortunatley cooked the engine a couple of years ago when I lost control and beached the boat. It screamed for a couple of minutes before I could get to it to shut it down. I really need some information on idetifying it properly so I can get new parts. It has a custom exhaust flange with water lines running in and out. Other than that it's pretty much the same as what's on the website. I just need to now if there are any distiguishing features that would tell me what year it was manufactured so I can get the proper parts. I really would like to rebuild it. It's a real screamer!!!! It's positively evil with a tuned pipe. If anyone can help me it would be awesome
Thanks.

[MECOA]

these are the only changes...

Changes were made to the crankshaft.
Early 12mm, later 13mm.

Very early 3.5's sleeves had a smaller O.D. Crankcase I.D. and sleeve OD must be checked.
Early size is .750 -- Late/current size .765

Early 8906 had a clamped in prop shaft assembly.
New style will not fit. You must replace the entire lower unit.

[david brooks]

I have an older 3.5 inboard also and don't know the number.

It is a front intake with exhaust throttle.

The venturi is located at 90 degrees off vertical.

Its missing the exhaust throttle...I hope I can still buy one.

[MECOA]

Please start a new post next time.

For exhaust throttles try parther products.

http://www.pratherproducts.com/