JFlo86
Cadet
- Joined
- Jun 23, 2020
- Messages
- 7
The suspect: 2011 267 SSX 377mag 6.2L Engine ID 1A621151
I've been experiencing an intermittent engine shut down while operating at either idle speed and/or cruise speed. The only consistency with the failure is it typically occurs after 20-30 minutes of operation, once took as long as an hour (of heavy use) to occur. Twice I have a noticed a bucking/ hesitation, literally seconds before shut down, but only twice. Furthermore, the condition does not seem to represent itself while only idling in my slip, as I've left it running at idle and high idle twice for 30 minutes each session with no issues. When it does shut down the boat has restarted immediately twice, however, typically it takes another 20-30 minutes to restart. Boat runs like a top when it does run! Not once have I heard any alarms and there's no info on the data display for active failures. I am awaiting a marine tech to connect a scan tool to see if the PCM is storing anything? Do boats log run cycles so a tech could obverse data points that may be dropping off when the boat fails- I haven't been able to get a straight answer on this? Also will there be stored DTC's if I've never any alarms? The boat has been out on the water operating flawlessly for the last month of continuous use until this has happened! Marinas here in NH are so busy I'm afraid I could be out of commission for a while now, especially with how intermittent this issue is! Thank you all in advance for any and all help!
What I've tried:
- Swapped fuel relay with known good relay while not starting- no change.
- Installed an ignition control module (only the ICM, coil visually appeared to be in good condition- no signs of cracks or arcing), one time while not starting I tapped the ICM and it restarted immediately. However the next day that proved to not be the fix.
- Full ignition tune up, cap rotor plugs wires installed last season.
- IAC replaced last season due to failure.
- New fuel filter in cool fuel module, but did not replace the discs because I found out about these after installing the fuel filter. After replacement I filled tank with 40gal of fresh fuel with marine 360 for peace of mind. Furthermore, the history I have on the boat, the fuel module TSB for paint delamination (Bulletin # 2016-01) has been completed. But now I've discovered TSB #2009-01 for replacement of the Gen III fuel module but it doesn't describe a run condition that would be present? I'd always thought a fuel pump either works or doesn't?
- I was able to attach fuel pressure gauge to rail during no start, 43psi. Installed in line spark tester and found no spark. Boat restarted before I could continue on.
- Kill switch appears tight and the wiring visually looks to be in good solid condition.
- And finally, I've checked and rechecked every other single connector inside the engine bay.
-John
I've been experiencing an intermittent engine shut down while operating at either idle speed and/or cruise speed. The only consistency with the failure is it typically occurs after 20-30 minutes of operation, once took as long as an hour (of heavy use) to occur. Twice I have a noticed a bucking/ hesitation, literally seconds before shut down, but only twice. Furthermore, the condition does not seem to represent itself while only idling in my slip, as I've left it running at idle and high idle twice for 30 minutes each session with no issues. When it does shut down the boat has restarted immediately twice, however, typically it takes another 20-30 minutes to restart. Boat runs like a top when it does run! Not once have I heard any alarms and there's no info on the data display for active failures. I am awaiting a marine tech to connect a scan tool to see if the PCM is storing anything? Do boats log run cycles so a tech could obverse data points that may be dropping off when the boat fails- I haven't been able to get a straight answer on this? Also will there be stored DTC's if I've never any alarms? The boat has been out on the water operating flawlessly for the last month of continuous use until this has happened! Marinas here in NH are so busy I'm afraid I could be out of commission for a while now, especially with how intermittent this issue is! Thank you all in advance for any and all help!
What I've tried:
- Swapped fuel relay with known good relay while not starting- no change.
- Installed an ignition control module (only the ICM, coil visually appeared to be in good condition- no signs of cracks or arcing), one time while not starting I tapped the ICM and it restarted immediately. However the next day that proved to not be the fix.
- Full ignition tune up, cap rotor plugs wires installed last season.
- IAC replaced last season due to failure.
- New fuel filter in cool fuel module, but did not replace the discs because I found out about these after installing the fuel filter. After replacement I filled tank with 40gal of fresh fuel with marine 360 for peace of mind. Furthermore, the history I have on the boat, the fuel module TSB for paint delamination (Bulletin # 2016-01) has been completed. But now I've discovered TSB #2009-01 for replacement of the Gen III fuel module but it doesn't describe a run condition that would be present? I'd always thought a fuel pump either works or doesn't?
- I was able to attach fuel pressure gauge to rail during no start, 43psi. Installed in line spark tester and found no spark. Boat restarted before I could continue on.
- Kill switch appears tight and the wiring visually looks to be in good solid condition.
- And finally, I've checked and rechecked every other single connector inside the engine bay.
-John
