PDA

View Full Version : Vibration


mrhodes12
06-14-2013, 11:56 PM
Took the boat out for the second time this summer and noticed a vibration at 2000-3000 rpm. I figured a bent prop, so switched to a new prop, problem still there. Any ideas of cause? Bad fuel, fuel pump, tranny problems? Anyone else had problems such as this?
Thanks Mitchell

bturner2
06-15-2013, 09:46 AM
Check for play in the thrust bearing. Could also be alignment.

mikeg205
06-15-2013, 10:39 AM
check true-ness of drive shaft - if prop was struck - shaft may have some wobble to it.

j.mccreight@hotmail.com
06-15-2013, 10:44 AM
check true-ness of drive shaft - if prop was struck - shaft may have some wobble to it.

Ha you said wobble...
http://www.youtube.com/watch?v=UH5hUULu4Nk

mikeg205
06-15-2013, 12:01 PM
Ha you said wobble...
http://www.youtube.com/watch?v=UH5hUULu4Nk

lol... too funny

john jones
06-17-2013, 12:38 AM
I didn't believe it myself. Everyone said that you should be able to spin your prop with two fingers. I never could. On my last two boats I always had to use two hands. I figured that was the way it was. I also had a vibration at 2000 rpm, I pulled my prop shaft and it was bent!

After I had the shaft straightened back to .004, replaced cutlass bearings, installed the shaft and believe it or not I could spin it with two fingers! Vibration at 2000 rpm was gone.

I would look towards your prop shaft.

mrhodes12
06-20-2013, 12:26 AM
After some research I drained the gas tank added sea foam and fresh non-ethanol gas, the boat ran much better, I know I will be adding a ethanol treatment from now on. Thanks for your replies