Alright, I have 79 Aquasport 18' with a 79 Evinrude model number 115793S 115 HP engine. Last week i was out and took a tube with us for the first time. After the boat planes and i get to around 28MPH (4700RPMS) it starts 'sato loose power. It kinda sounds like it's loosing fire, this gets worse when im in the corner, the sharper the wqorse it gets. If i let off adn restarted it would run WOT till around 28 again and do it all over again.
So i came home noticed hairline cracks in two if the coil packs adn replaced all four, and replaced the plug while i was there. The old plugs were not to bad, a little oil build up.
Today took it out, ran great. Untill i put the tube on and the same thing happened. No load runs good, load runs terrible... Please help. Im out of ideas..
Also, after several attempts of pulling. The boat ran bad without a load. Although im sure it was running hotter than normal.
So i came home noticed hairline cracks in two if the coil packs adn replaced all four, and replaced the plug while i was there. The old plugs were not to bad, a little oil build up.
Today took it out, ran great. Untill i put the tube on and the same thing happened. No load runs good, load runs terrible... Please help. Im out of ideas..
Also, after several attempts of pulling. The boat ran bad without a load. Although im sure it was running hotter than normal.