temp, difference from starboard side (high) to port

[MID FL CAP]

I Just Replaced T-stat And Gaskets On Yamaha 1990 225,and The Starboard Side Runs Higher (180-190*)than Port Side (120's) Any Reason As To Why The Difference? Tahnks!

 

[rodbolt]

Re: temp, difference from starboard side (high) to port

reason why?
most likly the water pressure control grommet is defective and dumping water pressure at idle.
tends to make the top stbd side run hotter than the top port side.
gravity and all ya know.

 

[MID FL CAP]

Re: temp, difference from starboard side (high) to port

Thank you,rodbolt.I went ahead and changed the thermostat's,just to be one the save side!