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Old 08-27-2012, 10:27 PM
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sk8salomon sk8salomon is offline
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Boat: 2007 PS197 TT
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Engine Power loss

The craziest thing happend yesterday. I took a group of people out on the boat, picked them up at the dock, then took off down the lake only to find the boat would't go over 21 mph! speed control was off, no vibrations, felt normal rpm @ idle and starting. i pushed the throttle all the way down and nothing. i ran it down the lake for about 10 minutes, shut it off, floated around for a while, then retarted and same thing. floated around and idled some more, then took off and everything was back to normal. speed control works fine, throttle max rpm works as it should, etc etc. i had the dual fuel pump replaced about 3 years ago.
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Old 08-27-2012, 11:29 PM
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I bet fuel pump again...
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Old 08-28-2012, 12:30 AM
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sk8salomon sk8salomon is offline
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damn, that sucks. well, this time instead of buying the $500 unit, i'm going to replace the pump itself with the auto brand. did it to my buddy's X7 a few years ago and it's still running strong...maybe $95 for the pump.
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Old 09-12-2012, 01:47 AM
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sk8, Any update on the fuel pump issue ? any progress to find a fuel pump from auto parts store for around 100 bucks ? Thanks.
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Old 09-12-2012, 07:07 AM
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sk8salomon sk8salomon is offline
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i went out last weekend, tooled around for about 3 hours and no problems. then on the way back to the dock it did it again. shut the key off, sat for about 2 minutes, started back up and had full throttle. i guess i just need to pull the pumps, put 12v to them and see which one f-s up. i'll post up the model number when i pull them out. thanks for checkin in.
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  #6  
Old 12-15-2013, 06:11 AM
zok14841 zok14841 is offline
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Boat: Mastercraft Prostar 190, Corvette LT1 1996
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power loss on Corvette LT 1 engine, Prostar 190

Hello,

I had a similar problem last weekend. Went wakeboarding with my 1996 Prostar 190 and suddenly engine didn't want go over 2500rpm and sounded weird. I turned off the engine and started immediately again and everything back to normal, however a minute or so later again. So I had to shut down and restart the engine several times all the way back to the dock.

Changed fuel filter and spark plugs but no result. Can it be the optispark system or something with the computer?

Cheers
Roland
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Old 12-15-2013, 10:25 AM
blackcreek blackcreek is offline
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Roland, I would check the inlet screen at the fuel pump. What sort of noise is the engine making? If it is a high pitched whine I would guess your fuel pump is clogged or going bad. There is no optispark on an indmar LT-1, it is a northstar system. Overheating will cause the motor to go into limp mode so check for that also.
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Old 12-15-2013, 10:36 AM
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Quote:
Originally Posted by blackcreek View Post
Roland, I would check the inlet screen at the fuel pump. What sort of noise is the engine making? If it is a high pitched whine I would guess your fuel pump is clogged or going bad. There is no optispark on an indmar LT-1, it is a northstar system. Overheating will cause the motor to go into limp mode so check for that also.
But RPM Reduction (the real name for what people call 'limp mode') limits the engine speed to 2000 RPM and it toggles the injector banks, so it won't run smoothly.
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Old 12-15-2013, 10:37 AM
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To the OP- check the plug for the harness on the fuel pump. Also, check the ground wires at the rear of the engine.
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Old 12-15-2013, 11:35 AM
blackcreek blackcreek is offline
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Originally Posted by JimN View Post
But RPM Reduction (the real name for what people call 'limp mode') limits the engine speed to 2000 RPM and it toggles the injector banks, so it won't run smoothly.
And you just wrote a long explanation of it a while ago. Did not catch the RPM diff.
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