Difference between Marine 383 and regular 383 Engine

[DodgeChargerNeeded]

could someone tell me the difference.

[Daytona R/T SE]

Some of those marine engines are reverse rotation....they run BACKWARDS!

[694spdRT]

I installed a '68 383 from a houseboat in my 68 Charger. The rotation on mine was not reversed but that does need to be checked. The only differences in mine were the front water pump housing, brackets and pulleys all needed to be changed, the exhaust manifolds were different, and the oil pan and pick up tube were different. The starter and the carb were also marine style and had to go. The long block was a basically a 1968 383 engine. It was rebuilt prior to my getting it with a aftermarket automotive cam so I don't know what type of cam they would originally have in them.

[Rolling_Thunder]

Well...     i know 440 maring engines pretty good...    in the reverse rotation engines...   the distributor has a revered gear, the camshaft is revered, and the crankshaft has an extra ring machined on it -

[andy74]

the cam in a marine engine is designed for low rpm and torque,because boats usually run a pretty limited rpm range,similar to a motor home cam,so id change that too-also i see it has already been brought up,but make sure its not reverse rotation,although 100 miles an hour in reverse would be kind of cool!!! 

[TylerCharger69]

yeah...All of the inboard engines that I've seen run backwards.

[bull]

Also, the marine application 383s were used in boats while the regular 383s were used in cars and trucks. Sorry.

[694spdRT]

yeah...All of the inboard engines that I've seen run backwards.

The 383 I used from the houseboat was in a dual engine set up...so one runs reverse and one runs standard. I wonder what the fuel use was in that thing running wide open down the river. 

[Rolling_Thunder]

yeah...All of the inboard engines that I've seen run backwards.

The 383 I used from the houseboat was in a dual engine set up...so one runs reverse and one runs standard. I wonder what the fuel use was in that thing running wide open down the river. 

Alot

[SeattleCharger]

Those Marine exhaust manifolds are radical looking, makes me think of pipes sticking up out of your hood, 

   I like those Dodge chrome valve covers you put on there, where did you get them?

[daves68]

The engine running backwards is a function of the cam. Change that, and it will run the other way. But first, check the knurl under the main seals. The backwards engine may have the knurl in the opposite direction of a standard crank.  If you run that marine crank  the other the other direction, it will tend to push oil out past the seal and drive ya nuts trying to find out why.

[tan top]

The engine running backwards is a function of the cam. Change that, and it will run the other way. But first, check the knurl under the main seals. The backwards engine may have the knurl in the opposite direction of a standard crank.  If you run that marine crank  the other the other direction, it will tend to push oil out past the seal and drive ya nuts trying to find out why.

good thinking (daves68)