Alarm Chattering

[DallasH20]

I have a Yanmar 3HM35F with a B type instrument panel. At low idle and after warming up, the spare instrument light flickers and the buzzer begins to chatter, not buzz constant but chatter. None of the other 3 lights (temp,voltage,oil) are affected. I found the other end of this spare at the engine and determined that it was not touching anything. Has anyone had this problem, or may know where to guide me in the search for this new gremlin.
Thanks,
Cpt. Randy
Foxy Roxy Sails : Specializing in sunset sails, charter cruises, special event trips, and full moon cruises on Lake Ray Hubbard, Dallas Texas

[lehtove]

Hello
I faced exactly the same problem (?) with my 3hm35F, when engine warms, the spare light twinkle and alarm buzzer chatters when low idles .

Any idea why?

captain Veli, Helsinki Finland

[donradclife]

Its time to go to a heavier weight oil.

[lehtove]

Thank you for the answer. But if problem is oil (I use 15w-40, as recommended by Yanmar), why doesn't oil light flicker?

sinc. Veli