Hi e-sailpilot86. Thanks for the info. I guess I'll just have to keep checking it to make sure it's not too hot and see how long I can run before it does heat up. I was getting a full run after making a brass water jacket and brush coolers so hopefully it will be the same. Some times I run at the Adornie Center. They put in a really nice floating (cement) dock. If there is too much sea weed then I go to the bridge at Manila by the lumber mill and some times at the river mouth at Moonstone beach. The motor is a Feigao 8L in a 20" vee hull