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Showing results for tags 'Stalls'.
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engine beep than stalls
nnoia05 posted a topic in Centurion Boat Maintenance, Performance, Troubleshooting
hello, so bought my first centurion last year and had a great season with it, no problems, everything worked great. I put it into a nice heated storage building over the winter and now that summer is finally here, the boats broke! Been stalking the forum for some time without any luck so far, figured I would post on here, share some info and maybe it will help others in the future once I get my problem figured out. The deal is, when cold boat starts right up, runs no problem at all. after about 6 minutes a single beep goes off, the engine surges about 2 or 3 times and it dies. it will start and run again no problem for about 2 minutes, than same thing. it will do this about 4 times and after that runs for only about 3 seconds and dies right away. Let it sit overnight and the process is exactly the same. I really think it is a temperature related problem. I purchased a scan tool for it to check for codes, only 4 codes set and they will not clear out, just come right back. code 75 fuel level 1 circuit high, code 119 steering position circuit low, code 104 lake/seawater temp circuit high, code 191 fuel level 2 circuit high. from what I understand all these codes are normal to be set due to the fact this engine does not have these sensors. so it is not setting any codes that are related to the problem. also noticed with the scan tool when streaming data, when the engine beeps and begins to surge, the scan tool data values disappear, scan tool stays powered up, the paramaters stay there, but its like the screen freezes. eventually a loss of communication message appears. engine shuts down, and I can back out of the screen and go back into it and everything is fine. engine will start right back up without any problems until it happens again. also noticed with the scan tool a guardian mode parameter and a engine power displayed in percentage. both stay at a normal reading with power at 100%. so far I have ruled out overheating, coolant temp doesn't go above 165. removed coolant hoses with engine running, plenty of water flow, also has a new impellar with stainless plate. I did notice, port side exhaust manifold riser stays cold to the touch, starboard riser gets fairly hot, not burning your hand but very big temperature difference. don't think its an issue, was just wandering if this was normal battery voltage with scan tool, gauge on dash, and checking voltage at both batteries with multimeter always shows above 13 volts with engine running. don't believe there is a battery or charging system problem. playing with the lanyard does not seem to effect how long it runs, seems to run the same amount of time no matter what, goes through a similar cycle each time, almost like its more of a heat soak kind of problem. also the gauges do not loose power at any point so I don't think it could be an ignition switch problem either. the engine surges up and down and dies. I really am leaning towards a faulty ecm, just seems like every single time the beeper goes off and it acts up, the computer goes haywire and bugs out. my engine serial number is om395784 it is a 5.7 black scorpion. the boat is a 2004 avalanche c4 I'm really hoping somebody else has ran into a similar situation and could help, but if not, at least I can add some knowledge to the forum and maybe someday help somebody else out -
Engine Bogging
willywankah posted a topic in Centurion Boat Maintenance, Performance, Troubleshooting
Hello, I just bought a 1998 Ski Centurion with a Mercruiser 350 mag mpi. I love this boat but have an issue in which the boat runs well but once it sits after a use (for an hour or two) and I start it again, it boggs bad and eventually the engine stalls out. So far, the symtoms seem to go away the following day. Oil pressure, engine temp are normal throughout use. Fuel filter, oil, oil filter, tranny fluid, spark plugs, serpentine belt were changed recently. Added Sea Foam to fuel. Boat is raised on a hoist between engine starts. The performance is similiar to what is shown in this video (about a 60-70 seconds into the video). My boat is not the one in this video. I would appreciate any feedback!