Lots of good information on here, but nothing yet that seemed to be my problem. For 4-5 months, buzzer came on after 4500 rpms, but would run solid all day. When the buzzer came on, motor would run really rough, take it down to idle and buzzer would turn off and motor back to running smooth. So, for a while, I kept it under 4200 rpms and recently started buzzing frequently, decided it was time to fix. In my infinite wisdom, 
I don't recall if was consistently the temperature alarm (only arrow flashing over the temp indicator) or what. But now it's definitely all three arrows flashing on the tach.
Replaced stats, buzzer would come on after 3800 and even when idling
Cleaned head covers and water jackets buzzer came on after 3800 and idling
Ensured poppet valve clean and spring looking good, buzzer still here
Unplugged both temp sensors, buzzer still there and motor ran rough
Note: when i touched the heads they were hot, but not 'that' hot and never any steam or anything like that coming out.
Another fun fact, the oil pump on the remote tank had gone out a long while back, so have been filling the oil in the engine tank directly. I know, I know, it's always been 'the next project'. Anyway, I know it's using oil because I always check before I go and when I come back to ensure it's not the problem.
Any ideas/suggestions on what would make would make the buzzer come on intermittently, with all 3 arrows flashing? Appreciate any help.
I don't recall if was consistently the temperature alarm (only arrow flashing over the temp indicator) or what. But now it's definitely all three arrows flashing on the tach. Replaced stats, buzzer would come on after 3800 and even when idling
Cleaned head covers and water jackets buzzer came on after 3800 and idling
Ensured poppet valve clean and spring looking good, buzzer still here
Unplugged both temp sensors, buzzer still there and motor ran rough
Note: when i touched the heads they were hot, but not 'that' hot and never any steam or anything like that coming out.
Another fun fact, the oil pump on the remote tank had gone out a long while back, so have been filling the oil in the engine tank directly. I know, I know, it's always been 'the next project'. Anyway, I know it's using oil because I always check before I go and when I come back to ensure it's not the problem.
Any ideas/suggestions on what would make would make the buzzer come on intermittently, with all 3 arrows flashing? Appreciate any help.
