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Old 01-31-2018, 07:13 PM   #1
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Default Engine for '91 2300 SCR

I'm looking for an engine for this boat. I thought is was a 5.7L but looking at the sticker on the stern is says 230 max HP. There are no 5.7s with that hp. Can anyone help me to find what engine I need???
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Old 01-31-2018, 10:17 PM   #2
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Welcome aboard.

Do you still have the old engine? There will be a serial number cast on it which will tell you if it is a 5.0 or 5.7. I am assuming you have an Alpha 1 Gen 2 outdrive which is good up to 300 HP.

My 1997 came with a 5.7 rated at 260 HP with a 4bbl carb. I think the older 5.7ís were rated at 230 HP.

I see no reason why you cannot use a current 5.7, just because it has higher HP doesnít mean you will be running at that power level most of the time. Are you looking for a rebuild or a brand new long block or complete engine package?
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Old 02-01-2018, 02:11 PM   #3
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The marina I bought the boat from had already removed the engine. He had a 5.7 that needed rebuilding that he threw in. It was not the original engine that was in that boat. I have found engines for it, just concerned about the stern sticker showing 230 hp max and possible over stress on the mounts and stern. Thanks for the reply.
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Old 02-01-2018, 04:36 PM   #4
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Typically the Max HP rating is for safe operation of the boats handling. The engine mounting stress comes more from torque than HP however engines with higher HP tend to have more torque but again it varies across the power curve. For your boat I still feel the limiting factor is the outdrive which is good for 300 HP unless it's a Bravo which can take much more.

Can you post a picture of the sticker?
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Old 02-02-2018, 06:50 PM   #5
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Here's a picture of the sticker. I think I will go with the First Mate 5.7 engine through Summit. Any other help will be greatly appreciated....
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File Type: jpg 230stick[1].jpg (127.5 KB, 8 views)
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Old 02-02-2018, 08:54 PM   #6
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Interesting, I have not seen one of those on my boat.

Being a 1991 the engine is a preVortec and uses a mechanical fuel pump and 12 bolt intake manifold. Do you plan to stick with this or go with a Vortec? Are you reusing anything from the existing engine? Do you boat in fresh or salt water? If salt you may want to install closed cooling.
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Old 02-03-2018, 02:41 PM   #7
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Yes, I'll be reusing most all of the external parts, i.e. intake, exhaust, carb., etc. It will only be used on fresh water.....
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Old 02-03-2018, 08:33 PM   #8
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Ok the preVortec is rated at 260 HP so no worries. Being fresh water the exhaust, intake and t-stat housing should be in good shape.
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Old 02-09-2018, 05:03 AM   #9
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Not sure if you've solved your engine problem or not at this point but if not.
The boat sounds like mine and it comes stock with a 190 hp 4.3 litre. Mine is a 1992 2300scr. wide open with the 4.3 is 43 mph on the lake. I actually have the motor that I took out of my boat as I happen to have a 5.7 with the smaller heads that produces 260 hp. It is a little large for the build of the boat as mine also says 230 hp max. on the sticker.
The 4.3 litre that i have has very low hours on it if you are interested. At this point i wish i had not replaced the 4.3 with the 5.7. originally i had thought it would help it get up on the water easier and cruise at less rpm there fore getting as good or better mileage. Now i am not so sure, the design of the hull is so efficient on this boat that it requires very little to get up on a plane and maintain it that the 4.3 would have been fine and I would not have had to go through so much time and expense.
Anyways not sure if that helps
good luck
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Old 02-09-2018, 11:09 AM   #10
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Quote:
Originally Posted by Ross View Post
Not sure if you've solved your engine problem or not at this point but if not.
The boat sounds like mine and it comes stock with a 190 hp 4.3 litre. Mine is a 1992 2300scr. wide open with the 4.3 is 43 mph on the lake. I actually have the motor that I took out of my boat as I happen to have a 5.7 with the smaller heads that produces 260 hp. It is a little large for the build of the boat as mine also says 230 hp max. on the sticker.
The 4.3 litre that i have has very low hours on it if you are interested. At this point i wish i had not replaced the 4.3 with the 5.7. originally i had thought it would help it get up on the water easier and cruise at less rpm there fore getting as good or better mileage. Now i am not so sure, the design of the hull is so efficient on this boat that it requires very little to get up on a plane and maintain it that the 4.3 would have been fine and I would not have had to go through so much time and expense.
Anyways not sure if that helps
good luck
What is the gear ratio of you outdrive? May not be matched for the 5.7. What is the WOT with the new setup?
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