I've got a mid/late 80s Yamaha 15 horse, electric start, long shaft, 2-stroke. The engine has been sitting on a boat in my driveway for a few years, but I've owned it since new and it has not been abused. Last year I cleaned out the carb, blended some new fuel and oil, replaced the plugs, and fired it up in a barrel. It ran fine. The water pump is still squirting water out like a champ. I did the same this year, and finally took the boat to the water for a quick ride to make sure everything was going to work in a real life situation. Well, I need to get new couplers for the fuel line as the O-ring on one end is shot and it does not seal properly, but I can got past that by squeezing the primer bulb frequently. What bothered me is that I remember the motor pushing my little 14 foot Mirrocraft a lot faster than it did this time. The boat didn't really get up on plane, and the motor seemed to lack the power it once had. I'm planning to do a decarbonization this weekend, and I'm going to blend up some new fuel as well, but is there something else I can do here? It should go without saying that I'm looking for a fast/easy/cheap way to get this thing back to running like new. I'm planning to give the whole rig to my dad for him to use and I would rather he didn't have any issues with it.<br /><br />Thanks in advance for any advice you can offer.
