Yamaha - Temperature Warning Sign problem

[SteveGB]

Not sure if anyone can help on this matter  ,

After about 8 hours with my 100 hp Yamaha 4 stroke engine motor running (5 hours of which I was trolling), as I decrease speed from cruising to enter port I heard a continuous beeping sound and noticed that the temp warning sign was blinking. The beeping sound and sign continued for maybe 30 seconds and then stopped. I checked immediately if water was coming out from the motor water outlet and it looked ok. Also checked if there was any plastic etc covering the water intakes but at that time noticed none. I stopped the motor and continued entering Xemxija at a slow speed. The warning sound did not go off again.
I service the motor every summer by a Yamaha mechanic, and this has never happened to me before. The boat has been at me for 6 years now, and I changed the impeller approx 2 years ago.

Any suggestions what could be the problem? Obviously I will be talking to my Mechanic about this but wanted to see if this has ever happened to someone else, and if I should be very worried and not use the boat offshore for now???

Anything else i should be checking myself to see whats the problem?

Thanks a lot nies,

[skip]

Could be your impellor needs replacing Steve. Was it only happening at cruising speed? Given that would be when the engine needs to circulate the most amount of water....when was the last time you changed your impellor and remember that sometimes they can shred even if they were changed recently. It's happened to me before on my Dad's Mercruiser V8s

[guido99]

I would guess you or your mechanic may not have checked your thermostat recently, and you may have a restricted flow of coolant because the thermostat is fouled with salt deposits or faulty.

[guido99]

Have you solved the problem with your motor yet ?

[baghira]

Same happened to me but the alarm was engine failure.
Tested it and resulted a Solenoid valve, Part from RLR costs double the price of Zarb Stores. (Amazing!!!!!!!Same part exaclty).

Wow these electronics...... and I just serviced it few months back.

[skip]

As yours is a Suzuki engine underneath, makes sense to a certain extent. 3rd Party factory makes part for Suzuki, comes into their stock system at Price X. Suzuki dealers get it for X + y% markup as it's used on various zuke engines. BRP places small order for these parts as Johnson are no longer made but they have to keep parts support. BRP get it for a much more expensive price, put their own markup on it, sell it to BRP dealers who put another Mark up on it and then it comes to the end user.

What's interesting is that when I was looking for my new engine I was looking as Suzuki or Evinrude. Zuke were several thousand euros more expensive than Evinrude BRP. And availability of the Zuke would be quite long in comparison. BRP upped warranty in 2011 to 5 years and still no maintenance needed for 1st 3 years guaranteed by the factory. To me that was a no brainer, especially given the power advantage in the hole shot that a 2 stroke design has over a 4 stroke,lower maintenance costs etc.