Optimax norm temp

[Tony Barber]

Hi,

Does anyone know the normal temp an optimax 150 should operate at idle and WOT?

I thought 2 new thermostats had cured my overheat at idle, however its back again!

Also, any tips for changing the impeller? Is it DIYable? I found a good thread on changing the impeller on a Yam. Any major differences?

Thanks,

Tony.

[Tony Barber]

Hello

[Searider]

Hi Tony,

Not sure of the correct running temperature but it must be in the owners manual somewhere - mine isn't to hand though. If you don't have one they can be downloaded from.

Changing the impeller looks simple but I always leave it to my dealer.

Not quite the answeres you were looking for perhaps - but at least a reply


Regards

[brucehawsker]

I have had overheat warnings when crawling (2 knots - reading a manual or testing the radio) on the way down the Lymington River a couple of times - 70C ish. A quick shut down and a restart two mins later on one occasion, and a few more revs to get the water flowing on the other occasion, solved it...

[Tony Barber]

Originally Posted by Searider

Hi Tony,

Not sure of the correct running temperature but it must be in the owners manual somewhere - mine isn't to hand though. If you don't have one they can be downloaded from.

Changing the impeller looks simple but I always leave it to my dealer.

Not quite the answeres you were looking for perhaps - but at least a reply


Regards

Cheers Duncan.

I can't find the normal temp in the manual. I may get the dealer to change the impeller and just watch/help so that I can do it next time.

Tony.

[Tony Barber]

Originally Posted by brucehawsker

I have had overheat warnings when crawling (2 knots - reading a manual or testing the radio) on the way down the Lymington River a couple of times - 70C ish. A quick shut down and a restart two mins later on one occasion, and a few more revs to get the water flowing on the other occasion, solved it...

Hi Bruce,

My temp guage was showing 100c at WOT and climbing up to 170c at tickover. It seems to run OK at WOT still? The impeller is on order so hopefully that is it.

Thanks

Tony.

[Searider]

Tony,

170C! - surely you mean 170F?

Duncan

Originally Posted by Tony Barber

Hi Bruce,

My temp guage was showing 100c at WOT and climbing up to 170c at tickover. It seems to run OK at WOT still? The impeller is on order so hopefully that is it.

Thanks

Tony.

[Paul F]

Tony
What is the block water pressure at idle ??
If you have lack of water flow do to worn impeller it would normally alarm under block pressure.
So it well may not be the impeller?
I know that doesnt help but if you have good block pressure at idle then the impeller sound as though it may be ok.
To change it is quite easy.PM me if you decide to change it
Paul

[Tony Barber]

Originally Posted by Paul F

Tony
What is the block water pressure at idle ??
If you have lack of water flow do to worn impeller it would normally alarm under block pressure.
So it well may not be the impeller?
I know that doesnt help but if you have good block pressure at idle then the impeller sound as though it may be ok.
To change it is quite easy.PM me if you decide to change it
Paul

Hi Paul,

I think the block presure was around 1.1 at idle. That is from memory. Unfortunatley my alarm buzzer is knackered so unsure if it alarmed. I tend to rely on the guardian system, which did not kick in.

I find the problem with smartguages is that they alarm all of the bloody time!

Thanks for the offer of help.

Tony.

[tim griffin]

Do you get an alarm up saying check Pitot