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Old 08-28-2015, 01:12 AM   #1
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Default I like boats

Well I went ahead and bought my first boat. Its a 1999 1900sr bow rider. I paid $500 bucks and it came with a trailer. The problem is the motor had been replaced with a 5.7 suburban motor. It looks like the did put the brass freeze pkugs in the block and since I got the boat home I went ahead and pulled the motor... its a vortec with roller cam. A project
I want to go with an edelbrock intake and carb. Really thinking about a heat exchanger at least a half system. Hopefully this winter I can have everything ready for spring. I am missibg some things so I might need some help from experts here.
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Old 08-28-2015, 01:27 AM   #2
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Welcome aboard

A good a great winter project to help carry us all through the winter.

Besides the freeze plugs the cam grind, ignition, fuel system are different for marine use. Also starter and alternator. Not sure what they used.

If you go with an aluminum intake then yes closed cooling.

Post some pictures.
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Old 08-28-2015, 01:37 AM   #3
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Thanks!
It had the 5.0 in it previously so it looks like some of those parts will carry over. As for the cam it seems some beleive it doesnt need to be changed?
Pic before I got it home, had to replace a few things on trailer before I could tow it..
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Old 08-28-2015, 01:40 AM   #4
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I pulled one head so far to clean it up. Its been sitting but bore looks really good. Boat itself it seems has been sitting since 2002!

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Old 08-28-2015, 03:01 AM   #5
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A street cam has more overlap than a marine and this cam result in water being drawn into the cylinders from the engines back pressure.

Also a marine engine runs constant at high rpms while a street runs under 2K normally so lift is different for best power curve.

Yes folks run steet cams but not ideal and risk of water intrusion. You call but if redoing the engine why cheap out on the cam IMO.
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Old 08-28-2015, 03:33 AM   #6
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The cam that came in this engine should be a 111 overlap, should be fine without sucking water. It may not be best at wot but for saving some money and getting this thing going im going to keep this cam for now.. I will consider myself warned.
I have pulled one head and cleaned the porting up.
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Old 08-28-2015, 03:49 AM   #7
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I forgot to mention if raw water cooler the head gaskets should be marine which contain stainless steel instead of copper used in auto gaskets.
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Old 08-28-2015, 03:54 AM   #8
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Good point. That was also one reason I wanted to pull the heads. Besides it had been sitting and mudd dobbers had made nests in the exhaust ports. Lol
Does anyone know if a heat exchanger will fit under the hood or what kind of battery size I need?
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Old 08-28-2015, 11:31 AM   #9
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I cannot speak to this model but I installed closed cooling on a Sea Ray 200, 20' bow rider and it fit fine.
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Old 08-28-2015, 12:22 PM   #10
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BTY not all closed cooling systems are designed to work with the lower flow of the Alpha water pump, Sea kemp and other do but read carefully to ensure the one you buy does.
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