marine 302 into a truck

[baddad457]

ohh so all i would need to do is get a cam and crank from a normal 302 and it would work in my truck?

I would first verify that its not a reverse rotation motor before spending extra money on it. Try rigging it up to run out of the vehicle, then hot wire and start it with an automotive starter and see if it runs. If it's a reverse motor it will not run in the normal rotation it's spun in with an auto starter.

 

[MaGiKaLsHoTs]

im bad with engines.. im more of a drive train(4x4) and frame person which way is normal rotation? counter clock-wise or clock wise?

 

[Psychopete]

im bad with engines.. im more of a drive train(4x4) and frame person which way is normal rotation? counter clock-wise or clock wise?

Clockwise looking at the front of the engine.

The starter bendix will spin counter-clockwise on a clockwise engine looking at it from the back of the starter as it would be in the transmission (because of the gear -> gear drive).

Pete

 

[Jason]

The only reverse rotation Marine engines are those that were one half of a twin engine installation. The single engine's are std rotation. The reverse rotation engine in a twin engine boat was done that way to counteract the opposite engine's torque, so if you let go of the wheel, the boat wouldn't want to steer in a circle. The prop orientation had nothing to do with it. A simple prop change would be all that was needed if so desired.

I have never had a boat with two engines. I have however had 4 boats with reverse rotation engines. In fact, every I/O I have owned spun counter clockwise and it was explained to me by the guys in the shop at the marina that it has to do with the makers of the props and outdrives.

 

[MaGiKaLsHoTs]

Clockwise looking at the front of the engine.

The starter bendix will spin counter-clockwise on a clockwise engine looking at it from the back of the starter as it would be in the transmission (because of the gear -> gear drive).

Pete

so if i look at it front the front if the start turns counter-clock wise that means the crank is normal rotation?

 

[v-8power]

The crankshaft will turn clockwise when the engine is running.

Edit: looking at it from the front of the engine.

 

[baddad457]

I have never had a boat with two engines. I have however had 4 boats with reverse rotation engines. In fact, every I/O I have owned spun counter clockwise and it was explained to me by the guys in the shop at the marina that it has to do with the makers of the props and outdrives.

Then it would have more to do with the design of the outdrive, and not the prop. casting a prop is an easy operation, no matter which way the blades face. I had it explained to me the way I posted previously.

 

[dirtsquirt]

Prop pitch!! left or right (one of each for a twin setup) A single drive can be either left or right depends on motor rotation!!

Marine engine use a special starter and alternator ( sealed unit) less chance of a gas fumes exploding! Water jackets in stead of rads. and water pump setup's in some are different. The real thing to watch out for are alot cooled from the water they are sitting in. if it has been run in salt water it has been salt water cooled. the water is picked up thru the leg in and inboard out board setup...

Rotation could be counter or clock wise, Dad would by motors for twin setup's but some times he would sell one unit ( so it could be hit or miss. )

 

[75tique]

OK, this thread is two years old and I'm sure the original poster has his truck all set with some new engine, whether it was the $85 one or not. But since people have continued to post, I figured I would to, from a boater's perspective rather than from a truck perspective to try to clarify some of the above remarks.

Marine converted engines came in both normal (left hand) rotation or reverse (right hand) rotation.

Yes, if a boat has two engines, one is left, one is right to balance out the prop torque so the boat does not lean or pull to one side. However, single engine boats also have left or right spinning engines. There is some debate as to why, but it usually comes back to right rotating engines and props offset the weight of the driver on the starboard side of a small inboard. They werent built that way to accomodate props, as props come in both flavors.

I personally did not realize single engine I/Os came with reverse rotations, I thought they were all left hand, but since I've never had one, I can't argue with that.

Most single engine boats now all have left hand ( or "normal") like a car. However, many (at least PCMs) have transmissions that reverse the direction of the spin, so that a left hand motor turns a right hand prop (again for the torque and leaning reasons).

As far as the $85 engine above, based on the info given, it could be either left or right. Two ways to tell, start it or investigate firing order, as the firing order is unique to left hand vs right hand versions of the same motor. If it turns the correct way, no reason it cant go in a car or truck. Take off the marine goodies which are all external. Cant hurt anything to have the marine carb, starter and alternator in a car, but dont do it the other way around for the safety reasons described above. As long as it turns the correct direction for your use, you dont have to mess with the innerds.