Jaspernuts Posted May 14, 2008 Share Posted May 14, 2008 I have a new boat with a minnkota autopilot on the front and it vibrates the whole boat when it is wide open. It is not the prop, looks brand new. Any ideas? Link to comment Share on other sites More sharing options...
Eric Wettschreck Posted May 14, 2008 Share Posted May 14, 2008 If you're absolutely sure the prop is perfect, I'd take a stab and say the prop shaft is bent out of round. If you have a dial indicator, take the prop off the shaft and put the dial on the shaft.Total indicted runout of any shaft shouldn't be more than .002. Granted, if it's a little more it shouldn't be that big of a deal. If it's, say, .010 then you have a problem. Link to comment Share on other sites More sharing options...
Jaspernuts Posted May 14, 2008 Author Share Posted May 14, 2008 thanks boiler, I will try that! Link to comment Share on other sites More sharing options...
Eric Wettschreck Posted May 14, 2008 Share Posted May 14, 2008 If you don't have a dial indicator, most auto parts stores have them. Doing a TIR on a shaft takes like 7 seconds. They should be able to do it right at the counter. Link to comment Share on other sites More sharing options...
marine_man Posted May 15, 2008 Share Posted May 15, 2008 When you say it's a new boat... does that mean it's a brand new trolling motor as well?If you've got everything bolted down tightly it's time to check into the warranty on the trolling motor in my opinion.You can narrow the issue down per boilerguy's info above, but if it's under warranty that's about as far as I'd go.marine_man Link to comment Share on other sites More sharing options...
Dbl Posted May 15, 2008 Share Posted May 15, 2008 One other thing to check is pull the prop off the trolling motor. Where the pin goes through the shaft the prop fits over that in a channel. If the prop, which is plastic is slightly off where the pin sits in it won't be perpendicular to the shaft. Its a matter of slightly shimming that channel on the low side of the prop where the pin sits to get the vibration to go away. I've had to do that to a couple of props. Good luck. Link to comment Share on other sites More sharing options...
Moe Szyslak Posted May 15, 2008 Share Posted May 15, 2008 I have a new boat with a minnkota autopilot on the front and it vibrates the whole boat when it is wide open. It is not the prop, looks brand new. Any ideas? I had a similar issue when I bought mine. The prop looked straight as an arrow when spinning out of water, shook entire boat when trolling. New prop fixed it. Just something to try down the road if nothign else works. Link to comment Share on other sites More sharing options...
Recommended Posts