XRI overheating at idle

[LAPLANT]

My 96 Merc XRI 150 is overheating at dle no water is coming out of the pee hle until around 1500 rpm
It doesn't overheat at all long as i keep it above 1500 rpm
I put a new impeller and pump housing in it
Thanks for the help in advance

[Big Red]

Did you have this problem before you changed the pump impeller

[LAPLANT]

yes

[zstevens]

what shape was the impellor ? possible blockage ?

[LAPLANT]

did not look bad at all

[Chris E]

did you change out both upper and lower housing, sometimes they can warp and cause a leak - just a thought

[cmpulse170]

Laplant I had a similar problem like yours. Mine was the base plate in the lower unit was warp from the heat. I replaced the upper and lower housing and that solve my overheating issues. Take a look at mercury water pump problems on the forum. http://checkmate-boats.com/forums/showthread.php?t=10730