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Message |
    
rob.sollart
Member
Username: robsollart
Post Number: 11
Registered: 03-2012
| | Posted on Sunday, December 08, 2013 - 06:19 am: | 
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Hi everybody
I have a question, the engine I'm taking care of, a P5m, doesn't get warm enough, the cooling water comes lukewarm out of the boat.
I noticed in the manual they mention a thermostat, even two types, but this engine has none.
Would be nice though.
Is it an option? where would it go, and how would it work?
What I have is the circulation pump, a copper pipe to the exhaust outlet cover(with water inlet nipple), from there circulation through the engine and from the cilinder head a pipe out.
Under the water inlet nipple there is also some kind of nipple, stuck, rusted, first I thought tha was supposed to be the thermostat, but that's impossible, there is no bypass, the pumped water would have nowhere to go if this nipple would close.
I would be gratefull for any information |
David Myers
Senior Member
Username: dave_myers
Post Number: 130
Registered: 11-2006
| | Posted on Sunday, December 08, 2013 - 07:06 am: |
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Hi Rob, The model with the thermostat uses a different Head assembly with the thermostat fitted into a cast recess and a different piping setup.
To increase the temperature with your current setup just insert a restriction in the water inlet line to slow the water flow. I had to do this with my 3 HP Hall and I used a small Ball Valve to do this. Works well. Just adjust the flow till the temp is warm enough.
Cheers, Dave. |
rob.sollart
Member
Username: robsollart
Post Number: 12
Registered: 03-2012
| | Posted on Sunday, December 08, 2013 - 07:39 am: |
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Hi Dave,
That is an increddeble quick answer, thank you!
So no thermostat for this engine. To restrict the water inlet could I also restrict how far the handle on the seacock can turn open?
kind regards, Rob |
Hugo deRrick
New member
Username: hugh_goderrick
Post Number: 2
Registered: 02-2011
| | Posted on Monday, December 16, 2013 - 02:49 pm: |
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Chaps -
The attached clarifies the 'thermostatic' P5 / P55 water routing when the engine is cold / hot.
In preference to throttling the water intake, I'd pop a bleed valve between the water pump outlet & the point @ which the water is piped into the block - this bypass valve can then be adjusted to vary the engine temperature...
Regards,
H.  |
rob.sollart
Member
Username: robsollart
Post Number: 14
Registered: 03-2012
| | Posted on Monday, December 16, 2013 - 03:19 pm: |
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Hugo,
Thanks for the drawing, it clearly shows the difference in piping between the models with or without thermostat.
I like the idea of making a bypass, i think I'll do that
cheers, Rob |
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