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Old 09-14-2015, 08:16 PM
Ben205 Ben205 is offline
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Boat: 1995 MasterCraft ProStar 205
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LT1 fuel issues, need advise on what to buy

OK.

1996 205 LT1

Noticed the boat starving fuel when the tank was about 1/4 full. Fuel pump was loud
Cleaned all lines, replaced high pressure filter and clear screen on the bottom of the pump and the bottom of the tank tube.

Put some Ethanol free 87 in it. Put it in the water. It run the best it has ever. It reached 5000 rpm with no hesitation.
After about an hour the pump was loud again and I could only get to 4000 rpm.

I want to put a water separator filter inline between the tank and pump.

Will I need to install a low pressure booster pump?

Any suggestions will be very helpful

Also.
Can someone point me to the lowest price for the lt1 fuel pump. I wonder if they are made of Gold.
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Old 09-14-2015, 08:25 PM
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Table Rocker Table Rocker is offline
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Boat: '96 ProStar 205, Sammy Duvall, LT-1
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I would wonder if my fuel tank vent tube was clear. If it is clogged up, you will have problems sucking fuel after running for a while. Try running with the gas cap loose.

I would also check the anti-siphon valve on top of the tank for being gummed up, the filter on top of the tank (if you have one) and the fuel lines for deterioration.
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Old 09-14-2015, 10:08 PM
Ben205 Ben205 is offline
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I did check the vent and all was good. I will try loosening the cap on the next trip as a test. Not sure about this anti-siphon valve. Can you post a photo. Did not have filter on top of the tank.

I blew the lines out. They looked in good shape. I will repeat the clean out tomorrow and install a new filter between the tank and pump. I have a filling the pump might be going bad.
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Old 09-14-2015, 10:42 PM
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Table Rocker Table Rocker is offline
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Quote:
Originally Posted by Ben205 View Post
I did check the vent and all was good. I will try loosening the cap on the next trip as a test. Not sure about this anti-siphon valve. Can you post a photo. Did not have filter on top of the tank.

I blew the lines out. They looked in good shape. I will repeat the clean out tomorrow and install a new filter between the tank and pump. I have a filling the pump might be going bad.
It is a fitting on top of the fuel sender box where the hose attaches. It is a little valve with an arm. They are known to gum up and cause problems. Good luck.
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Old 09-14-2015, 10:52 PM
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mikeg205 mikeg205 is offline
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Boat: 1995 Pro Star 205 5.7 Liter
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you can try a carter p61171 inline fuel pump - check the PSI on this pump.. the return should be ok and I believe can be by passed. The p61171 should deliver 40psi spec for lt1 is 30-45 psi.. the return should be ok. some others have bypassed this from the the base of the carter p60962.

the carter p61171 is like $70. would be great to find this out. same harness and regulator is external to fuel pump.
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Old 09-15-2015, 08:20 AM
Ben205 Ben205 is offline
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Seems this is a common problem. I will be looking into a different pump arrangement. Corvette did not use this set up.
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Old 09-15-2015, 09:04 AM
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Shaun R Shaun R is offline
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Check the fuel pressure when it starts giving you issues. Also, premium fuel is recommended for this motor. Runs on the cheap stuff, runs better on the good stuff.
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Old 09-15-2015, 10:16 AM
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mikeg205 mikeg205 is offline
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You can also use an airtex e8266 or equivalent - both marine pumps... I believe 95 and 96 auto were using intank fuel pumps. Not sure where the fuel pump regulator is on the LT1 - that could also be the problem.
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Old 09-15-2015, 12:14 PM
Ben205 Ben205 is offline
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I have asked my gear head buddies. They can't see a reason I just can't run a normal pump such as the e8266. Just eliminate the Tee on the return line.
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Old 09-15-2015, 12:45 PM
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Yes.. talked to many people about that as well and it has been done.. but it would be great to get pictures and a written account of success. There's a rubber valve which bleeds of pressure from current pump.. not sure how well that works and current pump has a plastic impeller. . Not sure how how that helps if pump primed for georotor pump.
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