I can change the engine chevy 4cyl 3.0L marine for other engine car, for bayliner? ?
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I need know the fit one engine car, i have problems with the parts originals, I want change all engine
Your question is a little hard to understand. There are differences between “marine-ized” engines and stock auto engines. If your question is can you switch to a V-6 or V-8 GM then the answer is No! It’s not only the engine but the drive that’s mated to the engine. Everything from gear ratio to mountings change. Perhaps if you could edit your question so we could better understand what you want to do. Good luck! ……….edited 9/31 Frank M is `correct, that’s why I said “evrything changes”, it’s not something you can find at auto salvage yards.

You can use any engine that you can get to fit. All you have to watch is the shaft diameter and engine mountings.
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Your question is a little hard to understand. There are differences between "marine-ized" engines and stock auto engines. If your question is can you switch to a V-6 or V-8 GM then the answer is No! It's not only the engine but the drive that's mated to the engine. Everything from gear ratio to mountings change. Perhaps if you could edit your question so we could better understand what you want to do. Good luck! ……….edited 9/31 Frank M is `correct, that's why I said "evrything changes", it's not something you can find at auto salvage yards.
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Of coarse you can!
One option is to get another chevy 3L block at a wreckers.
For different engines there are a few considerations…new marine exhaust manifold…carb…ignition. Then…you need a shaft that will mate up to your gearbox/outdrive or you will be getting it machined. You will likely need a machine shop to make an adapter plate to mount the gearbox/outdrive to the back of your engine as well. This is what makes it really expensive…the new parts that you couldn’t swap and the machine shop. Plus the cost of modifying engine mounts and beds.
Honestly…get another matching engine to bolt in. OR….get a whole used marine powertrain with outdrive and all.
Good luck.
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The 3 liter is an industrial motor not used in cars, therefor hard(er) to find, they show up on ebay though, also new.
Fitting another engine is possible but the rear engine mount housing has the specific 4 cyl. GM bolt pattern.
One car engine that would fit is the 2.5 ltr GM pontiac "Iron duke" , the mercruiser exhaust does not go on the 2.5 cyl. head so you ll have to swap it. Be aware that car engine bolt onn`s (carb,starter,dyno..) are not "marine certified" parts that are made to prevent sparks cousing a fire!
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I would like to know if the mercruise 3.0 with the right change of parts can be used on the street. If so other than the change to a chevy flywheel and trans. what other parts would need to be changed. This is for an old hot rod. Thnaks