nightwings28
Recruit
- Joined
- May 1, 2020
- Messages
- 1
I have a 2007 Mercruiser 350 MAG mpi Bravo 3 in a byliner discovery 244. On a recent fishing trip I was cruising on plane at 3400rpm in very slight chop when I had a sudden rpm reduction, then a complete shut down. I had alarms for check engine and low voltage but voltage, temperatures, and oil pressure were all normal on my chart plotter. When I tried to restart, the starter ran but the engine would not turn over, but this engine has always started up promptly. I checked the bilge, tried switching to my auxiliary tank, checked
my battery connections and tried again, but no go. I eventually had to head home on the kicker motor. After returning and having my mechanic come by, we checked the fuel pump pressure and quality, the idler control, and tachometer and all were fine. My Rinda diagnostic tool only listed one fault, #77, "camshaft sensor". After replacing the distributor cap and rotor, we tried again still had negative results. Also cleaned the air filter. next we checked the timing with the distributor and found that when the crankshaft was aligned and marked, the rotor pointer was not aligned with the #1 cylinder position. it was off by about 210 degrees counterclockwise. When reset to the correct position the engine started right up and ran more smoothly than ever and examination proved that the timing had reset perfectly. Now, my question is "what could have caused the rotor/distributor to be so misaligned in the first place?" The engine runs great now, but will it repeat the same performance again since we never found a cause?
my battery connections and tried again, but no go. I eventually had to head home on the kicker motor. After returning and having my mechanic come by, we checked the fuel pump pressure and quality, the idler control, and tachometer and all were fine. My Rinda diagnostic tool only listed one fault, #77, "camshaft sensor". After replacing the distributor cap and rotor, we tried again still had negative results. Also cleaned the air filter. next we checked the timing with the distributor and found that when the crankshaft was aligned and marked, the rotor pointer was not aligned with the #1 cylinder position. it was off by about 210 degrees counterclockwise. When reset to the correct position the engine started right up and ran more smoothly than ever and examination proved that the timing had reset perfectly. Now, my question is "what could have caused the rotor/distributor to be so misaligned in the first place?" The engine runs great now, but will it repeat the same performance again since we never found a cause?