sea foam top end cleaner
 

hey have any of you guys tried this stuff in your boat I just used a can in my truck sucked it into the intake with the pvc valve and let it sit over night. smoked like a ***** the 1st couple of miles but made a huge differnece in how it runs i was ammazed.

I have heard good things about it. I ran half a can through my 502 this spring just running it on the hose. I really can't tell yet if it is going to run better but, it won't hurt. Maybe I'll try the other half of the can in my 'burb. That will be easier to see if it makes a difference. I have been told you should change the oil after using it. It cleans up everything in the top end and a lot of stuff goes past the rings into the oil. The can says you can even run it in the oil. I suppose on an old motor it probably would be good to do that as well.