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Old 29 June 2009, 01:27   #1
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Country: Canada
Town: Tobermory, Canada eh
Boat name: Verius
Make: Zodiac Hurricane 590
Length: 5m +
Engine: Yamaha F150
Join Date: Oct 2006
Posts: 1,345
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Yamaha 150 4 stroke temperature gauge

I have a new 150 which I just purchased late last fall. I haven't put many hours on it yet, but it seems that the temperature reading on the gauge has always been dead centre once the engine is warmed up.

This weekend a couple of times I noticed the temp gauge running up closer to the 3/4 mark when I was running hard. The lake is still pretty cold... about 60F at the surface, but this is probably the warmest I have run so far.

Once I slow down, and run at more average speeds, the gauge returns to the centre area. I have checked the intakes and they are clear. The tell tale seems fine.

I'm wondering if this higher reading is normal or is it possible I have a problem... possibly the impeller needs to be replaced already???

Any thoughts? I'm getting into peak season and don't want any problems out there~~

Thanks!
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Old 29 June 2009, 02:39   #2
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Country: UK - England
Town: Near Godalming
Boat name: AJA
Make: Ribeye
Length: 6m +
Engine: Yamaha F150AETX
Join Date: May 2009
Posts: 558
I have this engine too.

I understand there is a Service Bulletin on some engines for the water pressure and speed sensors, mine is a new (January 09) engine and is awaiting these parts to be replaced. Could be entirely unconnected to water temperature of course.

I assume your oil level is correct?
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Old 29 June 2009, 23:30   #3
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Country: Canada
Town: Tobermory, Canada eh
Boat name: Verius
Make: Zodiac Hurricane 590
Length: 5m +
Engine: Yamaha F150
Join Date: Oct 2006
Posts: 1,345
Send a message via MSN to Stoo
Quote:
Originally Posted by neilda View Post
I have this engine too.

I understand there is a Service Bulletin on some engines for the water pressure and speed sensors, mine is a new (January 09) engine and is awaiting these parts to be replaced. Could be entirely unconnected to water temperature of course.

I assume your oil level is correct?
Thanks Neilda... I'll look into that. The oil level on the gauge was dead centre. I will check the stick as well...

Thanks!
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