Ford Marine
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From: Tennessee
Ford Marine
I just spotted a 300 I6 at a good price, but it said it's a marine engine. What would be the essential differences between marine and street versions? I've heard that some marine V-8's are reverse rotation so would that automatically mean the same here?
Steve
Steve
all alone in the world
Joined: Feb 2002
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From: oklahoma
could possibly be a reverse rotation engine. if it is a marine engine, the cams are usually ground differant. moves the powerband around, and changes duration. marine engines are designed to run at a certain rpm all the time with only minor fluctuations up and down.
i am sure it would work, but it might be a dog. or it could be a hoss, dont realy know for sure.
i am sure it would work, but it might be a dog. or it could be a hoss, dont realy know for sure.
Post Fiend
Joined: Sep 2004
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From: Near Fresno, California
Reverse rotation engines were not common - only time they were used was with a twin screw setup - one engine balances the thrust of the other and the boat goes straight in the water. On single screw setups, the boat always drifts in the direction of rotation. The few I have seen had stickers everywhere identifying them as reverse rotation, but if any question just pop off the distributer cap and look at the points -
I have a Ford 302 built into my big boat - and it is a hot rod. It came with 351 heads and high rise 4 bbl manifold.
The one thing you have to worry about is the crud in the water jacket - they are cooled by "fresh water" - which is not so fresh sometimes. I have seen marine engines used in salt water so corroded that you could not force water through them.
I have a Ford 302 built into my big boat - and it is a hot rod. It came with 351 heads and high rise 4 bbl manifold.
The one thing you have to worry about is the crud in the water jacket - they are cooled by "fresh water" - which is not so fresh sometimes. I have seen marine engines used in salt water so corroded that you could not force water through them.
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From: Tennessee
Thanks guys,
I didn't think about the target-use rpm ranges and cam issues in marine equipment at all. And water jacket corrosion due to open system fresh and salt water use, that didn't register either.
Good info and and I really appreciate it. It also gives me a few new things to consider about the I6 300's in a few local New Holland combines. Based on their designed usage range, they probably wouldn't be very good candidates either, except for basic parts maybe. Thanks again =)
Steve
I didn't think about the target-use rpm ranges and cam issues in marine equipment at all. And water jacket corrosion due to open system fresh and salt water use, that didn't register either.
Good info and and I really appreciate it. It also gives me a few new things to consider about the I6 300's in a few local New Holland combines. Based on their designed usage range, they probably wouldn't be very good candidates either, except for basic parts maybe. Thanks again =)
Steve
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Marine engines are very good swaps for they are higher in horsepower then a stock auto engine. You do have to watch for corrosion in the water jackets, but that can be flushed out too. I would not hesitate about putting a marine engine in my truck. I work for a pleasure boat builder. Marine engines are made to mantain 4000 rpms plus for long period of times. and it is the same basic block as what came in the cars. Boat engine manufactures have used Dodge, Ford and now GM for there blocks.
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From: Tennessee
So... As long as I replace the cam (and probably carb jetting) with a more "streetable" version and the rust isn't a problem, I'm pretty much good to go?
And more horsepower to boot?
Steve
And more horsepower to boot?
Steve
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From: Tuttle, Oklahoma
I had a marine 5.0 in an '84 'stang, had the original marine cam and everything. that thing was a hoss!! it had the aluminum dual plane intake and a carter 725, man it WAS fast. the car is now in someones refridgerator or something as I sold it and the next owner trashed it out and scrapped it 
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I woouldn't change a thing, if you start changing stuff you could ruin the performance of the motor. Just drop it in and enjoy.
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ford marine 302 reverse running engine
Hello, I just purchased a 302 ford marine engine.That was before I knew anything about reverse running engines. I want to put this engine in a fairlane but now I don't know if it will work. anyway I saw your thread on this site and had a question. You said look at the points, but what am I looking for? How can I tell if I have a standard rotation or the reverse? thanks for all you time and knowledge .....Wayne(dd881)
Elder User
Joined: Oct 2008
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From: wi
marine engines are cammed verysimilar to truck engines , thers differaances in the bearing clearences and such . but offer a better build than a similar truck engine . marine engines carry a flat tourque curve , excellant off idle response . getting the boat on plane / getting the truck moving / verry similar engines actually.
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