Quote Originally Posted by Tiller guy View Post
I ran the 122 jets and the motor ran great, but I lost 1 mph. So I re installed the 125's and my idle mixture was off again. I thought it was running great on the hose so I went out for another test and now I'm down 2 mph? I was concerned about losing speed so I did a compression test and it's still really good. My spark plugs got really wet from loading up on the hose with bad carb settings and the motor was missing a little when I did the test run, but it did clear up. Could my plugs be fouled, but still run so so? I will spend more time dialing the mix screws in and use a new set of plugs for the next test run. If this doesn't work I'm buying a bigger motor!
Don't give up yet!