By now you probably remember the details of my motor. 1995 Yam 175, purchased about a year ago, has about 700 hours on it. On the cooling sys I have replaced impeller, t-stats and poppet. I don't know the details of its maint history but do know it was not great. The motor currently runs great and pees like an eighteen year old.<br /><br />As part of spring maint would you advise pulling the heads cleaning and inspecting the water channels etc?