2004 Yamaha 115

[truckrunner9]

Im having problem around 3800Rpm*s after you run about 1/4 mile the alarm starts going ,I shut it down turn key off and right back on the alarm want be on I have changed the heat cencers change pop off valve water pump impeller .
Went had a mechanic check if there was any restriction ,He cant find what it setting off the alarm.wounder if any one has had this problem.

[99yam40]

Post model # and if you have gauges that show what alarm is coming in.

[robert graham]

Maybe low oil setting off the alarm?....

[TownsendsFJR1300]

Im having problem around 3800Rpm*s after you run about 1/4 mile the alarm starts going ,I shut it down turn key off and right back on the alarm want be on I have changed the heat cencers change pop off valve water pump impeller .

Not sure what "back on the alarm" means?

When you re-start the engine, is it ok until you get the RPM's back to 3,800 RPM's?

Use of some periods and separate sentences would make it a bit easer to understand what's actually going on.
Thanks..

[99yam40]

spell check would help also

[TownsendsFJR1300]

How's it go, "my Ford needs an alternator?"

[Speedcop]

Im having problem around 3800Rpm*s after you run about 1/4 mile the alarm starts going ,I shut it down turn key off and right back on the alarm want be on I have changed the heat cencers change pop off valve water pump impeller .
Went had a mechanic check if there was any restriction ,He cant find what it setting off the alarm.wounder if any one has had this problem.

I have 130 Yamaha (which is more or less the same as the 115) and I had all sorts of problems with RPM reduction, alarms going off, etc etc.
Bad or rusted electrical connections can cause the same symptoms. ie. RPM reduction and alarm.

I'll repeat a previous post for you. This may sort your problem out...

On advice from many learned folk on the forum, I cleaned carbs, fitted fuel pump kit checked oil reservoirs, etc. Nothing helped! My problem turned out to be the electrical feed from the battery! I had fitted a “kill switch” or battery isolator The thing was corroded and rusted inside! This was causing a voltage drop. I replaced this, cleaned my battery connections on both ends, engine and battery and PRESTO problem solved!!