Join Date: Mar 2007
Location: New England
Thanked 7 Times in 7 Posts
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Re: Yanmar Oil Pressure Pegged
What weight oil? If it is too heavy (viscous) the pressure will build up in the manner you are seeing until the oil heats up.
If the weight is right I think it's more likely your pressure sender is "off" than the relief valve is at fault.
I am using the same oil I have used since day 1, Rotofella (sp?) 30 Wt. If Pressure sender is "off" wouldn't it not work once the motor is warmed up? When the motor is warmed up, the gauge appears to read fine.
Thanks for the response.
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