need some help here guys cant seem to get enough water through motor to cool enough in water runs fine on hose checked all lines n hoses no clogs just spurts out any ideas ps if hose is hooked under manifold it runs cool just not enough volume in water stumped here thank for any help

 

If a saltwater machine, the whole water jacket can get corroded enough to slow water flow. Otherwise check hose fittings. The hoses might be OK when you disconnect them, but a small pebble, or other debris can clog the fitting. this includes the fitting on the pump itself where the original hose feed comes off the pump for engine cooling.
Also, the water temp sensor housing can clog internally.