www.iFourWinns.com

Hi All,

Just a quick question about how to ID OMC I/O's...I have an '89 Sundowner 205 and I'm pretty sure that the engine is the 5.7, however, I have to say, the block looks a little small for a GM 350 - maybe it's just because the engine compartment is so tight. The distributor is in the back so I'm almost certain that it could not be the 302 Ford - because as far as I remember most earlier Ford engines have the distributor in the front, and the carb looks like a Quadrajet. I've emailed Four Winns with the hull ID requesting a build sheet for the boat, however, they told me that [their] records do not extend that far back. Any ideas? Thanx, guys.

My motor has a little metal ID tag on one of the brackets on the top of the motor. Different motor, I know, but there should be some sort of serial number or something that you could possibly cross reference. If you find some numbers, post them here and we'll try to help you look them up.

Another thought...you might be able to figure it out from the registration information. They usually list HP and maybe even engine serial.


Andy

_________________


'88 Sundowner 205
4.3L OMC

All GM "small block" V8s look the same (with the exception of the new LS series and the LT-1s). Whether it's an old 265 cid, a more current 305 or 350, or a 383 (6.2 liter) or the 400.

Yours will either be a 305 (5.0 liter) or a 350 (5.7 liter) ... if it's a V8. If it is a V8, it's likely a 5.0.

Are you sure that it's not a 4.3 liter V6 (also GM, and very common on this boat)?

_________________
Gordon Arnold
New Hampshire

2003 268 Vista ..................................................................Prior: 97 245 Sundowner

It is definitely a V8. I ordered an OMC factory service manual and I'm awaiting its arrival. As far as I remember the 305 and 350 are identical in size, it is the bore diameter that affords the larger displacement of the 5.7 liter. I will try and find the engine ID tag this evening.