Freshwater cooling system Right side Runs HOT! 95 Crownline 266 CCR Mercruiser 454

[somebeach69]

Hi,

Need help, the Freshwater cooling system in our 1995 Crownline 266 CCR Mercruiser 454 is running much hotter than the left side. Left side gauge reads 175 but right is much much hotter when hooked to water hose. So far They have done the following and are stumped: 1) Cleaned Heat Exchanger (4 inch), 2) Replaced manifold, 3) Cleaned tubes on heat exchanger, 4) Changed impellor. Any ideas or help would be very much appreciated!!

Josie

 

[Bt Doctur]

Re: Freshwater cooling system Right side Runs HOT! 95 Crownline 266 CCR Mercruiser 45

if this is a half kit with the manifolds raw water cooled then inspect/replace the riser.

 

[somebeach69]

Re: Freshwater cooling system Right side Runs HOT! 95 Crownline 266 CCR Mercruiser 45

Took off riser and manifold, risor seemed find, manifold seemed blocked so replaced just manifold. Dashboard gauge reads 175 even though running very very hot on right side.