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Old 03-10-2011, 06:59 PM   #1
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Yamaha 90 water pressure

What's the correct WOT water pressure for a 2 stroke Yamaha 90?
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Old 03-10-2011, 07:16 PM   #2
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mine with no stat at 2500 rpms and hier 5 to 7psi
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Old 03-10-2011, 07:50 PM   #3
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Running an Argo Cat at 83 mph? - Nil.
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Old 03-10-2011, 08:49 PM   #4
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Ashleighs backdraft with bobs nosecone and thermostat always runs 20-25 + psi whether stationary or moving once above 2500
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Old 04-10-2011, 07:55 AM   #5
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Location: West Coast of Norway
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Interests: surface piercing props, stepped hulls, air entrapment hulls
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Thanks for your input.
What the best instrument for measuring the pressure?
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Old 04-10-2011, 09:08 AM   #6
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water psi gauge
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Old 04-10-2011, 10:09 AM   #7
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Location: West Coast of Norway
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Interests: surface piercing props, stepped hulls, air entrapment hulls
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Boat make: PetterTintorera
Engines: Yamaha 90
Cruising area: West Coast of Norway

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Was thinking more if was normal to use mechancial or eletrical instruments?
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Old 04-10-2011, 10:11 AM   #8
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I always use mechanical for water pressure, and electric for fuel pressure.
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