Surging and Detonation

and if he ever does decide to have me fix, he will bring his own parts that he scabbed somewhere off the internet

I know he wont except money from you, so make sure you bring him a pie or something nice when he's done with the carb

That isn't the original carb. We have a 1992 Surpa Comp Ts6m with the pro boss ho engine and it has the pro-tech ignition. The carb on ours has a different fuel line setup for higher fuel flow, you could be running out of fuel.

Okay I beat the rain this morning and had a chance to get the boat out with a mechanic friend. We changed the plugs and gapped them to .045. I had tightened up both fuel bowls and they were not leaking so we watched closely when attempting to run it.

The boat started right up and idled great. We took it out into deeper water and I eased on the throttle. This time, it almost instantly bogged when given throttle. We repeated the process 2 more times and she backfired like crazy both times. We then shut her down and checked everything over.

Since everything looked good, we fired it up and gave it a little fast idle while my buddy sprayed carb cleaner around the intake and spacer to see if we were leaking vacuum...nothing showing. I said, "Okay, let me just hammer down on her and see what we get."

I hammered down on her and she jumped out of the water speeding up to 45 mph with ease. One small hesitation that was barely noticeable. No popping, no decreased speed and shaking, nothing. I throttled down and looked at my buddy in disbelief. We continued testing it for the next hour taking it through all the paces. We even let her idle for about 5 minutes to see if she would "load up." Nothing. Ran awesome!!

Here is his thoughts. Sticking power valve when we first started going. Hammering throttle got it unstuck and it freed itself.

Got the rebuild kit today. I will wait until winter to have carb rebuilt. Crossing my fingers that there might be some upper 70's left this year.

Well threw some new plugs in her and got 2.5mph which is still slow and could just be a bit choppier water and the lack of the bimini.   ProTec is back on the chopping block for the winter. I had high hopes the plugs might work, the wife has given the OK for a Wetsounds upgrade for the tower, I guess it won't be quite as loud now. Lol. Plugs needed to go anyway 300hrs is plenty and only spent $20 inculing the 4 that fell in the lake while I was getting the cover off.