Loud warning tone when at idle speed

[grantcool]

When I'm at idle speed, sometimes I get a loud warning tone. 20ft Sunchaser with 60hp Yamaha. Motor isn't overheating - I still have peeing and runs nomally at speed.

 

[alldodge]

Move you to Yam because this is a motor issue, not a sun tracker

Your motor is peeing but it may still be over heating. Guessing you don't have a gauge.

When it does this, try increasing the idle a bit and see if it stops.

Also when was the last time the impeller was serviced?

 

[boscoe99]

Before you start the motor pull the kill switch lanyard. Then crank the motor. Turn the key to the start position that is. The alarm should sound.

Is this the same sound you are hearing when operating at idle speed?

 

[99yam40]

it would be best if we knew what 60HP yamaha he was talking about

 

[boscoe99]

it would be best if we knew what 60HP yamaha he was talking about

Top secret info. Folks don't want to tell. Keeps us guessing. God only knows what they do with incorrect information because responders confuse motors.

Got to be a two stroke since there is no F in front.

 

[grantcool]

Sorry, I've been away. It's a T60 2017. Impeller replaced last year. Pees fine at idle. WOT for 7 miles, (20 minutes) then abrupt slow idle, but alarm doesn't come on, which doesn't make sense if it's too hot. Intermittent. I'll try the start position with lanyard off.

 

[99yam40]

Sorry, I've been away. It's a T60 2017. Impeller replaced last year. Pees fine at idle. WOT for 7 miles, (20 minutes) then abrupt slow idle, but alarm doesn't come on, which doesn't make sense if it's too hot. Intermittent. I'll try the start position with lanyard off.

that is not what you started out saying

When I'm at idle speed, sometimes I get a loud warning tone. 20ft Sunchaser with 60hp Yamaha. Motor isn't overheating - I still have peeing and runs nomally at speed.

 

[grantcool]

that is not what you started out saying

When I'm at idle speed, sometimes I get a loud warning tone. 20ft Sunchaser with 60hp Yamaha. Motor isn't overheating - I still have peeing and runs nomally at speed.

I don't know what you mean? I wanted to clarify that after running WOT for 20 minutes in warm Florida water, it should overheat when I go to idle. But it doesn't

 

[cyclops222]

Long delays ? I usually go after electrical parts slowly dying.

 

[99yam40]

I don't know what you mean? I wanted to clarify that after running WOT for 20 minutes in warm Florida water, it should overheat when I go to idle. But it doesn't

your title on this thread says you have a loud warning tone at idle.
now you say "Pees fine at idle. WOT for 7 miles, (20 minutes) then abrupt slow idle, but alarm doesn't come on,"

I am confused on what you are saying also.
does the alarm sound or not?

 

[grantcool]

your title on this thread says you have a loud warning tone at idle.
now you say "Pees fine at idle. WOT for 7 miles, (20 minutes) then abrupt slow idle, but alarm doesn't come on,"

I am confused on what you are saying also.
does the alarm sound or not?

The alarm is intermittent. Comes on at random times. I'm guessing a short

 

[cyclops222]

I am NOW reading 2 possibly NOT connected problems.
Use a boat until it is too scary to use ?

 

[99yam40]

The alarm is intermittent. Comes on at random times. I'm guessing a short

so what does this mean?

WOT for 7 miles, (20 minutes) then abrupt slow idle, but alarm doesn't come on.

does the motor drop RPM by itself?

 

[grantcool]

so what does this mean?

WOT for 7 miles, (20 minutes) then abrupt slow idle, but alarm doesn't come on.

does the motor drop RPM by itself?

No that's when I enter an idle speed zone

 

[KJM]

No that's when I enter an idle speed zone

I understood exactly what you meant. Is the alarm just for over heating? Could it be low oil or something? I agree that after 20 min WOT then back to idle, it should over heat then if over heating is really the problem. As said above, could be an electrical problem.

 

[99yam40]

OK this should be a T60LB if the OP gave the proper info.
being a 4 stroke motor it has oil pressure sensors.
from what I have read in the past if the oil pressure gets out of the RPM/oil pressure range the ecu is programed to have,
either too low or too high it can sound an alarm.
some motors have a water in fuel alarm but I think that only sounds if your in neutral

 

[grantcool]

OK this should be a T60LB if the OP gave the proper info.
being a 4 stroke motor it has oil pressure sensors.
from what I have read in the past if the oil pressure gets out of the RPM/oil pressure range the ecu is programed to have,
either too low or too high it can sound an alarm.
some motors have a water in fuel alarm but I think that only sounds if your in neutral

That sounds like the answer that makes the most sense for this behavior. I'll try to find out if the T60 can have temp and pressure gauges hooked up

 

[JohnTN]

If it alarms only after a few minutes of idling then I would suspect a worn water pump impeller that just doesn't move enough water at low speed.