Oh theres nothing to be fixed. Motor doesnt smoke, starts right up, runs smooth (when the mixture is proper), and even idles real low. Had it out on the water today for like 3 hours, and it was running for most of that time, and it was at WOT for a lot of the time. Mounted on a 13ft row boat...its all the motor that thing needs.
I suppose maybe changing the gaskets would be a good idea, there is a little oil around the outside, though Im pretty sure that could just be coming out the carb. Other than that Im under the impression I should make sure the impeller (water pump) is working properly, even though it showed no signs of running hot.
If the consensus is I should stick with the stock carb, well cool then, its kinda neat. But I definitely think I should have twin expansion pipes... Again, only to lessen the amount of fuel going into the water.
So any ideas what displacement this is? Or even if you knew the displacement on your 3hp that would give me a general idea. id like to know what size the carb is on your 3hp too, again, just so I know a bit more about this thing.