Re: OMC Big Twins
Welcome to Iboats, R.C.<br /><br />Certainly, if it's in good condition already. Many common service parts for them are still available and still manufactured. Plus they tend to be on the less expensive side, as far as outboard parts go. Iboats, for example, will sell you a new ignition coil for less than $20. <br />I would expect the 33hp to wear out a little faster than the 40hp and be a bit cold-natured since it's missing the thermostat. <br /><br />As for specs, the 40hp were 43.9CID engines, while the 33hp were 40.5CID. The 33hp was based off the late 50's 35hp engine which was the largest twin sold then. There's a few internal updates to it, and externally there are quite a few changes. The WOT ranges for both engines are 4000-5000 RPMS. The 40hps were generally Cadillac engines, often laden with features, while the 33hp engines were 'economy' ones. Period information can be found at the
Old OMC Site.<br /> <br />I will warn you, my opinion is biased about these engines. My 28hp (early '60s 35.7CID Big Twin) is sitting behind me, fresh from the painter's. I'm gonna need to get some sunglasses for in here.
<br />Many other people here run older big twins too. Some Twin twins.