Hello all, Ive been reading these forums for a while but just registered and posted because of a problem I hope someone can help me with. I have a 82 johnson 75hp 3cyl (model no. j75tlcnb) pushing a 17ft bass tracker. The motor has been sitting under a shed for about a year without running. I bought it from the previous owner and completely dumped the gas tank refilled with fresh gas, put on brand new fuel lines all the way from the tank to the carburators, and brand new spark plugs. I fired it up with the muffs on and it ran fine in my yard. Took it to the water and it took off like a bat out of He** and then lost almost all power about 200 yards later. It would only run about 5mph with the throttle all the way down. The ball was still tight, pulled off on a sandbar checked it over for a few minutes and it did the same thing again, this time it just died a little quicker. It does this like clockwork, anybody got any idea what could be causing this? At first I was thinking carburator but it has three carburators and it doesnt seem to me like all three would have the exact same problem and cause such a sudden power loss all at once. Could it be a bad power pack that heats up and quits firing all cylinders properly? Any help would be greatly appreciated. Thanks in advance.
