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Old 07 December 2013, 12:39   #11
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But that's too late, you don't get the alarm until the system fails. With a pressure gauge you can monitor the condition of the system & anticipate a failure before it happens. If the impellor is on its way out, you will see the water pressure gradually start to fall off over successive trips out. By having the gauges, I know the characteristics of the boat & know what I should be seeing. What you're proposing already exists, it's called an over temp alarm Which I think has already been patented
Good point. So it is a worthwhile investment? (Strange that you can choose so many gauge options on a boat, but not on a car.)

Considering that the motor is typically half the cost of the boat I would say the more you know about it, and that it is working properly, the better.
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Old 07 December 2013, 12:41   #12
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Actually I think my Suzuki engines have a temp warning light, so I can just rely on that. I wonder when it comes on ? Boiling, hot or just warm.
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Old 07 December 2013, 12:51   #13
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.........I wonder when it comes on.........
Too late probably
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Old 07 December 2013, 12:54   #14
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Ha, yes, probably.

Ive got the Suzuki tech chap comming to visit me in the week to do a printout on my engines and hand me some log books which got forgotton when I got the boat, so I will ask him.

Hes making a special trip, which is nice of him.
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Old 08 December 2013, 12:38   #15
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Allwaŷs fit one my self,


Find it invaluable, as aforementioned you see the pressure dropping daily,
you know about. Forth coming doom, long before any alarms have spoiled your planned day out,!
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Old 08 December 2013, 14:24   #16
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If my Opti didn't have one, I wouldn't have known that the guy who'd serviced it before I got it had messed up fitting the new Poppet valve parts.
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Old 08 December 2013, 16:25   #17
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its probably worth noting that a worn out impeller would show low pressure, but a blocked tell tale outlet would show high pressure - both meaning water not circulating around the engine properly
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Old 08 December 2013, 16:41   #18
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a blocked tell tale outlet would show high pressure - both meaning water not circulating around the engine properly
Unlikely. The telltale is a tiny proportion of the water flowing through the motor.99% of it comes out the prop centre.
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Old 09 December 2013, 02:41   #19
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What NOS said. The telltale is just that - a water circulation indicator; it's not required as a water ejection route.

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Old 09 December 2013, 03:57   #20
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So, wouldnt it just be simpler to measure engine temp then ?
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