Looking for repower advice on F25

[classicf25]

We just picked up a 1973 F25 and it has a siezed up 318 in it. Was considering a little more horsepower. The boat will probably be well loaded most of the time and I would like decent performance without heavy fuel expenses. I have heard the Chrysler 360 is about the same size and should fit in easily. Any recommendations and performance info would be greatly appreciated. It is a beauty and we can't wait to put her in the water

[Allen Sr]

Make sure that its the marinized version first off. Secondly I think the blocks are the same so bolting up the accessories shouldn't be a problem. Others that are more knowledgeable on Chryslers should be able to answer your questions with more detail.

[prowlersfish]

The 360 is based on the same block so size is the same and all the bolt ons are same , I believe the fly wheel is different ( balanced ) so make sure you use a 360 flywheel and balancer.

The 318 is in my opinion is one of the best marine engines made , nothing wrong with sticking with it .


before using any parts off the 318 find out why the engine seized

[bkwesq]

I am buying a 1976 Trojan 25

the seller claims this is a 318 but what does it say 225?

Thanks

http://www.boattrader.com/listing/1976- ... n-96875226[/img]

[ready123]

I am buying a 1976 Trojan 25
the seller claims this is a 318 but what does it say 225?
Thanks
http://www.boattrader.com/listing/1976- ... n-96875226[/img]

Because 318 is the size Cu ins and 225 is the HP for that engine.

Is that mould I see in the head?

[bkwesq]

I dont know if it is mold or mildew, the boat arrives on Saturday. Regardless, it will be gutted and replaced. I think I will keep the 318, is that likely the original motor?

Thank you for your response.

[ready123]

I dont know if it is mold or mildew, the boat arrives on Saturday. Regardless, it will be gutted and replaced. I think I will keep the 318, is that likely the original motor?
Thank you for your response.

I would expect it to be original.... my two originals still run very well in my F32.
Many consider the 318 to be almost bullet proof.

[bkwesq]

I cant wait to get my hands on this boat! I have had a few smaller boats but this my biggest one. I'm not very handy but I expect to learn quickly. The engine is seized so that will be my first project. Rebuild, repower or replace.

Thank you again for taking the time to reply.

[myakka]

I owned an F25 re-powered with a 360. It added 25 hp. I can't remember the numbers but it didn't uses too much more fuel as compared to the original 318.

[vabeach1234]

I have a F26 with a 318 but mines a V-drive. The 318 is a great little motor that's easy to work on. I sometimes wish I had a little more power but usually simplicity is a better option for me seeing how I do most of the motor maintenance myself. I think you may have a hard time finding a complete 360. There are a lot of longblocks out there but the accessories like the flywheel of the 360s are getting harder to find. The 318 parts are still readily available. One thing to note, I had a hard time finding a mechanic to install a Chrysler in my boat when I replaced the engine. Everyone wanted to drop in a GM motor because that's what they usually put in and you can order them complete. The Chrysler had to pretty much be built from a long block and parts off my old engine were used to complete the build. Fyi, My boat doesnt have the clearance for a GM vortec motor, they are too tall but yours might.