I have a twin 454 crusader engine installation. The water temp started creeping up towards 200 F last fall ** 3000 RPM (not run ** this temp for long). I changed the raw water pump first with no real results. I then went to change the thermostats and discovered that there were no thermostats installed at all. I installed new thermostats and bleed the system per crusader manual. Engines still ran around 190F, both left and right. I checked these indications with a IF gun and they were correct. I then turned my attention to the risers and manifolds. I changed both engines to the newer XL manifold styles and risers. Ran the boat and have the same problem. I will also add that I have already checked spark plugs and timing, all found to be good. Engines ran a little cooler around 185F. I have not yet gone after the heat exchanger yet. I will also add that the exhaust steams when under a good load. Any sugestions???
Also the raw water side seems to flow without restrictions.
Thanks for any suggestions in advanced!!
Tucker
Also the raw water side seems to flow without restrictions.
Thanks for any suggestions in advanced!!
Tucker