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I have a 95 SKN with a gt40. This weekend it started running rough and hesitating when pulling up a skier. Once the boat planes and is up to speed it runs fine. The boat also runs fine under idle. Any body have an idea where I should start?
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I had the same trouble last year - same boat same exact problem. I checked my timing - it was fine. I changed my fuel filter and that helped but then the problem occurred again. I changed plugs, cap and rotor - no change. I finally checked my fuel pressure and it was reading only 30 psi when it should be 40. Over the winter I put in new high and low pressure fuel pumps. I am putting the boat in the water tomorrow for the first time of the season so I will let you know how things turn out. -
Cool. Look forward to hearing from you. Hope you have a great day!Comment
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Do you still have the protech type ignition system? If so then it'll probably be coil related. Heaps of posts on this problem have a search here or on the "other" board
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I just took the boat out for the first time. With my new fuel pumps my pressure was up only 4 psi ( 34 vs 30). The boat ran great. No skiers though. However I did at least ten rapid accelerations from dead stop and there was no hesitation at all. I will look into the Protech ignition system just for fun to see if that needs some attention. I think there may be some ethanol in my gas or something but for right now it seems fine. Do you know if we have protech ignitions ?Comment
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Great. This helps alot and gives me some place to start. How do I measure the pressure on the pumps? I just looked in my owners manual and it showed that I had the Protec ignition system. This is what they install to protect the boat from overheating, low engine oil pressure and poor quality fuel , etc. Thanks for the info.!Comment
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Guys, if you have the "GT40" 310HP multiport injection motor, you do NOT have the Protech system.Comment
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