Description
The ultra 300 does have cooling issues due to the shallow water jacket design on the cylinders. The 310 has far deeper water jackets for increased cooling under full load and high RPM in hot climates/summer. Upgrading to the 310 cylinder is a great choice for engine longevity and reliability. Comes with everything you need to use the 310 cylinder. Comes with all the hoses, clamps, brass tee, check valve, and hull securing mount. Please use a 300 head gasket with the 310 cylinder.
