I have a 2000 Yamaha f40 tlry on a 2000 playbouy pontoon 16 ft. the previous owner let the boat sit in the water for 3 years with out doing a lick of maintenance on it. when I bought it. I replaced the water pump, new ngk plugs oil changer with new filter. the bottom carb is great. however the middle and upper carb the high side is still stopped up. it will idle and run great on a water hose and muffs. but when I have the boat under a load in the water I can not get more than 7mph out of it. I have found the blockages in both middle and top carb. it is in the bowls. then have been sitting in a gallon can of carb cleaner for a week and this blockage has not moved. please can anyone tell me how to get them clear. I can not afford right now to take it to the dealer so I am stuck my self and a buddy of mine. we are both ase certified auto mechanics. I thought this would be easy but I guess I am wrong. thanks yall. please any help will be great.
dax
dax
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