1992 King Cobra 454 overheating. New Raw water pump and New circulating pump.

[WincentEdwards]

I read this old post from a fellow that had a similar problem. http://forums.iboats.com/forum/engi...-king-cobra-454-overheating-and-loss-of-power


​I am unsatisfied with the water flow, even off my hose. I'd love to see a flow diagram for what gets water first.

​cutting to the chase, putting a garden hose on it:

​I don't like the flow of water to the thermostat housing.
Lack of water makes me reluctant to run longer for fear of damage.

​suggestions?

 

[HT32BSX115]

I read this old post from a fellow that had a similar problem. http://forums.iboats.com/forum/engi...-king-cobra-454-overheating-and-loss-of-power


​I am unsatisfied with the water flow, even off my hose. I'd love to see a flow diagram for what gets water first.

​cutting to the chase, putting a garden hose on it:

​I don't like the flow of water to the thermostat housing.
Lack of water makes me reluctant to run longer for fear of damage.

​suggestions?

Howdy,

Welcome aboard!

Well, I think we covered it in the post you referenced. If the flow is low, aside from a damaged/worn out pump, flow restrictions are pretty much RESTRICTIONS in the associated hoses from the pump to and including any oil coolers and the exit points for the raw water. I.E the risers and/or manifolds if severely rusted to the point of blockage.

If you're gaging flow using a flush adapter (muffs etc) there's a limit on how much water you can stuff into the drive that way. (which is why most I/O manufacturers suggest NOT running above idle when on a flush adapter)

ALSO, I hope you're not trying to use a bucket or barrel to dip the drive in. That doesn't work unless you can get the water level above the pump in the drive.

Did you replace the raw water pump impeller?