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Old 07-08-2018, 12:53 PM
BenMCProstar205 BenMCProstar205 is offline
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Join Date: Mar 2017
Boat: Mastercraft Prostar 205V 2003 5.7L Vortec
Location: Southeast
Posts: 6
2003 Prostar bogging down

I've been fighting this for 3 weeks, and I've scoured these forums, but I am totally stumped.
2003 Prostar 205V 5.7 MCX. So far I have cleaned the fuel tank, changed the fuel pump, new fuel filter, new MAP sensor, new throttle position sensor, cleaned the throttle body.
The boat cranks and idles fine, as soon as I give it some throttle, it tries to plane out, then loses all power. I talked to a mechanic, he said to take the gas cap off and run it, so I did, and it runs great. What would cause this? A fuel line collapsing?
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Old 07-08-2018, 01:48 PM
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mikeg205 mikeg205 is offline
Join Date: Aug 2011
Boat: 1995 Pro Star 205 5.7 Liter
Location: Plainfield - Joliet, IL
Posts: 17,636
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...A bad day water skiing still beats a good day at work...1995 Pro Star 205....
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