525 problem
#1
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525 problem
I ran my boat this weekend which has a pair of 525s in it on my way back to marina one engine would cut out for one second and resume speed again, this would happen every 30 seconds. When idling around it would not happen only when the rpms were over 2000? Had dealer scan computers and found no codes. I checked compression, water in fuel everything checked out fine. I believe it's an electrical problem any ideas would help?
#3
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Check all of the grounds very good. Not only the battery grounds but also all of the ones on the back of the engine. They will be on the bell housing. Make sure they are tight and give them all a tug to be sure there are no loose connections. Good luck. Let me know if I can help.
Eddie
Eddie
#5
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Because neither the injectors nor the ignition system has much of an electrical draw at idle. That is especially true for the ignition system. The higher the rpms the higher the cylinder pressures and the higher the amp draw on the ignition system.
Eddie
Eddie
#6
also check the main engine plug. Each pin in the plug is split and shoudd have a small gap in it, when these get closed up they can cause some intermittent problems. Pull it apart, take a small screw driver and pry them gently open.
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Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
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10 OPA Class 1 National Champion ( happy now Ed! )
Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
Last edited by glassdave; 12-04-2010 at 01:30 PM.
#7
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Had an electric fuel pump cause something similar last about 2 springs back. It would be fine until rpms higher than the low 3000s. Over that is would reduce flow for a split second causing power loss that would come right back. Not very familiar with the exact 525 set-up but itmight be worth a look if the grounding checks out.
#8
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Had an electric fuel pump cause something similar last about 2 springs back. It would be fine until rpms higher than the low 3000s. Over that is would reduce flow for a split second causing power loss that would come right back. Not very familiar with the exact 525 set-up but itmight be worth a look if the grounding checks out.
#9
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Thread Starter
Ok had a friend ck all grounds and hot leads everything was tight ,also had him check plug end at main harness that was good as well. I wish I could be down at my boat but it is in Fla. right now and I'm stuck up here in NY for now. If it is a bad ground for say then why at 3,4 and 5 thousand rpm does it cut out for one second every 20 to 30 seconds like it shut down and then run fine?