115 Yamaha alarm sounds

[<Bequiet>]

I have a 115 Yamaha 1992 2 stroke model that a constant audible alarm goes off if I run it over 4000 rpm for any length of time (5 to 10 mins. If I back off for a minute or two it stops, and be fine until I get over 4000rpm again??? I had it serviced in November and a impeller installed at the time!!!! The alarm is constant not beeping!! Good water flow out of tell tail.
Any ideas????
thanks in advance!!!

[<scott whitson>]

I had the same problem with my 1990 115 Yamaha. It turned out to be the oil circuit in the tach/multimeter. It drove me crazy for a whole summer. I threw all kinds of money at it replacing everything in sight and none of it worked. I replaced the whole guage and it went away. I know that the guage is expensive but it works. I found mine online on the old bulletin board from a guy in New Hampshire named Steve Mc Cormick,last known e-mail is xcoastie2@aol.com. Try this and it should work. Scott Whitson

[<Jeff Taylor>]

Thanks for that Scott, will check it out!!!!