M
Michael Boyd
Guest
I have twin Mercruiser 8.1 HO
I have twin Mercruiser 8.1 HO inboards and experience an intermittent problem in my starboard engine. Intermittently (and with no apparent pattern) my guardian alarm sounds a continuous tone just as I exceed 3500 RPM. All gauges read normally and my Rinda scan computer shows no fault codes or evidence of the guardian system in memory (other issues from the past do show up in the memory however so there seems to be a memory function that works). Under this circumstance the guardian system does not cut power either. I finally was in a position to hook up the scan tool while the alarm was sounding and it shows the following codes (though once again none were retained in memory):
19 Overspeed
9 Guardian
3 Blk Pres (Low)
Both engines appear to run perfectly without any other incident. Shutting the ignition off and restarting often cures the problem for hours. Any hints would be greatly appreciated and thanks so much in advance for help…this is driving me slightly crazy!
I have twin Mercruiser 8.1 HO inboards and experience an intermittent problem in my starboard engine. Intermittently (and with no apparent pattern) my guardian alarm sounds a continuous tone just as I exceed 3500 RPM. All gauges read normally and my Rinda scan computer shows no fault codes or evidence of the guardian system in memory (other issues from the past do show up in the memory however so there seems to be a memory function that works). Under this circumstance the guardian system does not cut power either. I finally was in a position to hook up the scan tool while the alarm was sounding and it shows the following codes (though once again none were retained in memory):
19 Overspeed
9 Guardian
3 Blk Pres (Low)
Both engines appear to run perfectly without any other incident. Shutting the ignition off and restarting often cures the problem for hours. Any hints would be greatly appreciated and thanks so much in advance for help…this is driving me slightly crazy!