83 welcraft over heating

[RC Kirby]

have a 83 well craft elite 5.7. Recently had the bellows changed. Now the boat is getting hot. I have replaced the impeller, thermostat, and water pump. It only gets hot when running over 3500 rpms. Have checked all the hoses water is circulating. The boat will run at 3500 rpms and stay at approximately 160 degrees when you increase the throttle it begins to get hot, reduce back to 3500 it cools back down. Any suggestions thanks in advance.

 

[wahlejim]

You may be getting water flow, but is it enough water flow? Same thing happened to my 5.0 last year, impeller and water pump fixed the issue. Test the water flow first before digging in. The test has to be performed on the water, not on a garden hose

 

[porscheguy]

How old are the manifolds and risers?

 

[kenny nunez]

When the bellows was changed, was the hose between the bell housing and gimbal housing ? If the hose was not replaced it may have been damaged and is leaking. If the hose was replaced it might be too long and is kinked.
With the flush out start the engine and check if water is leaking from the hose.