2004 F115 Temperature Gauge Flash at High RPM (no buzzer, no engine reduction)

[fairdeal]

I put it in gear & manually pressed the shift position switch & got the blinking temp light plus an alarm. .

An audible alarm? the warning horn sounded?

[99yam40]

I would go to your local Yamaha shop and ask what would cause that light to blink

might find a manual for that gauge and read to see if it will say something about it

[TownsendsFJR1300]

I've been trying like hell to blow this photo up, but it's just too blurry. Anyway you can post it larger?

Disregard, tried to enlarge the pic, didn't work..

[99yam40]

An audible alarm? the warning horn sounded?

what would cause the temp light to blink with or even without the buzzers?
they have said both

[briankruz]

An audible alarm? the warning horn sounded?

Yes. Warning horn

[briankruz]

I replaced the shift position switch which cleared the irregular signal from the YDS. Took the boat for another spin. Real overheat: Blinking light, rpm reduction, & even some white smoke/steam. Shut it down as soon as it was safe to do so. Now when I start it it does not piss. When I hookup the hose to the flush port it does piss.. Plan to pull it out, drop & inspect the water pump/impeller which I assume is cooked. Nearing the end of my rope. Likely heading in for service depending on what I find.

[TownsendsFJR1300]

Per your first post, was the WP replaced BEFORE the issue started?

Or did the issue arise AFTER the install... Kinda sounding now like the install may be the issue...

[JohnF500]

Hey BrianKruz been trying to repost that pic but I can’t get it any larger- when I try it’s just really blurry...

[briankruz]

Per your first post, was the WP replaced BEFORE the issue started?

Or did the issue arise AFTER the install... Kinda sounding now like the install may be the issue...

WP was replaced before this started, but I ran the boat quite a bit before any issues presented. I confirmed today that it was installed correctly. That being said.. the impeller was damaged & the housing was melted. Was told this may be from me running salt away through on my shitty muffs. I plan to sea trial tomorrow. Will report back.

[TownsendsFJR1300]

Salt Away won't damage the WP, not enough water (leaky muffs), of course will..

Good luck on the sea trial..

.

[briankruz]

Salt Away won't damage the WP, not enough water (leaky muffs), of course will..

Good luck on the sea trial..

.

Thanks & yes I was more so pointing out that I've been running on muffs which I rarely do since its a 4S. They are no doubt crap muffs that I picked up at a marine flea market. That's what I get for being cheap..

[briankruz]

Seatrial was successful in a way. No real overheat, but the temp light remains blinking. I verified the thermostat was open when I returned to the dock. It also closed fully.

[briankruz]

Boat goes in to the shop on Friday. Will update on what they find.

[rejesterd]

Seatrial was successful in a way. No real overheat, but the temp light remains blinking. I verified the thermostat was open when I returned to the dock. It also closed fully.

There's a dip switch on the back of the tachometer. I would think that needs to be adjusted, or the tach itself needs to be replaced.

[briankruz]

Boat is still there (island time).. Hopefully will have it Monday-Tuesday. Problem ended up being the oil pump. They had to pull the powerhead to replace it. They say the team was going off at high RPMs because the oil wasn't reaching the top of the motor effectively. That would explain the oil light alarm at startup.