.and another really  clean looking one is for sale on this site's Classifieds, a few days ago, from Oakland CA ..


Paul

Here is a 312 marine engine for sale in Grant's Pass, OR

https://medford.craigslist.org/pts/d/grants-pass-engines/7101524042.html




.150 Stroked Y-Block:327.25 ci @ >1hp per ci
 

What a nice project!!  We live on a lake where there are lots of antique boats.  If I was younger, I would try to buy it from you. 

That engine was rebuilt and never put it in the water 25 years ago

Cliff, that Tollycraft appears unmolested and very restorable. Hopefully you can find a good home for it and that cool engine will live on.


64F100 57FAIRLANE500

Thanks Ted and everyone for the great information.  In regards to the camshaft, it appears that any Y-block cam could be used in any marine engine provided it matches the build.  If this project should some day take sail, I'll send reports. Now that I know what we're up against in regards to the engine, the first task will be to find a fiberglass watercraft with an out-drive already in place. The information generated by his forum is priceless, thanks again, JEFF..................


64F100 57FAIRLANE500

There are single engine boats out there with reverse rotation engines.  This was simply the result of having to make enough reverse rotation engines to make it cost effective to do so.  Because there were more of those engines being made than there were dual engine boats to put them into, the surplus of the reverse rotation engines went into single engine boats.  Those single engine boats used either a reverser transmission or a reverse angled prop.
 
The crankshafts are different but only in that the hash marks for the rear main seal are going in the opposite direction.  If using a reverse rotation crankshaft in a standard rotation application (or vice versa), look for a serious oil leak at the rear main seal regardless how good you think you are in installing those rear main seals.  The counterweights are the same.
 
While a majority of the reverse engines do have a ‘R’ stamped on the front of them, there’s no guarantee that that is easily spotted.  Simply removing the fuel pump and looking in at the timing gear set will verify if the engine is standard or reverse rotation.  If you see a chain, the engine is standard rotation and if you see a beveled gear, then it’s a reverse rotation engine.  While the distributor turns the same direction on both engines, the firing order is reversed on the reverse rotation engines.  Instead of the firing order at the cap being 15486372 in a CCW direction, it will be 12736845 in the same CCW direction.

Lorena, Texas (South of Waco)

Thanks everyone for all the comments and information. Clockwise or counterclockwise, would the crankshaft be the same? Would the direction of crankshaft rotation require counterweights that are specific for the rotation?


64F100 57FAIRLANE500

It's not hard to spot the reverse rotation engine. If you pull the timing cover you will find gears instead of a chain. I think the starter is reverse too.

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Buy mine