Ultrex Vibration?

[Mjgarret]

I recently got an Ultrex and if I turn the power to "6" or greater I get a pretty significant amount of vibration on the front deck. If I turn it to "10" the vibration get really bad (I bet you could feel it standing on the back deck.) Is anyone else having this issue? Could it be an out of balance prop?

[bison2312]

Got some good stick time on mine last weekend and it does the same at about 5.5 - 7.5 but when I go up to 8 - 10 it mellows out again. I literally feel the deck pulsating. I have a G-Force eliminator prop nut on mine that I was going to take off and see what the the vibration did with it off.

[Mjgarret]

I've emailed minnkota. We'll see what they say back.

[ch]

My ultrex does the same at about 6. My fortrex done it really bad until I put the g-force nut on it, then it settled that mess down. But my ultrex has the g-force nut from my fortrex on it and doesn’t seem to help it. Like was said in an above post, I too am thinkin about puttin the regular nut on it to see if that helps. I haven’t tried the regular prop nut on the ultrex.

[danfromwindsor]

Are you guys running a 24v or 36v Ultrex?

[remaly181]

My .02 - the instructions for the prop installation are very specific. You need to put a wrench on the nut and a flat screwdriver in the slot on the prop shaft. If you do not tighten it down correctly, e.g., just tightening the nut, then you could get vibration.

[Sun Fish]

No vibration issues with my 52" 36v. Somethings not right.

[reelmin5]

Take off the prop and see if the shaft spins true without it. If it's still vibrating, you have issues...

[Mjgarret]

Thanks I'll tinker around. For the record mine is a 36v 112 lb

[Mjgarret]

Minnkota recommends taking the prop off and rotating 180 degrees.

[kry29]

My ultrex does the same at about 6. My fortrex done it really bad until I put the g-force nut on it, then it settled that mess down. But my ultrex has the g-force nut from my fortrex on it and doesn’t seem to help it. Like was said in an above post, I too am thinkin about puttin the regular nut on it to see if that helps. I haven’t tried the regular prop nut on the ultrex.

The g force nut made it worse on my ultrex. Went back to the regular nut

[Mjgarret]

Has anyone tried rotating the prop 180 degrees? I haven't been back out on my boat since I got that suggestion from Minn Kota - wondering if anyone has had any success?

[ch]

Tried the 180 thing on mine and didn’t help. But I did remove the washer that was behind my g-force nut and that did help a lot. Very minimal vibration now. I don’t know if I was supposed to remove that washer though.

[davethebuilder]

I was able to get out yesterday 1st time since I installed my ultrex pretty bad vibration. I still like it but I'm not crazy about the vibration. I also wish I would have went with the 45" instead of 52" oh well live and learn

[Brent11]

I seen a video on YouTube about tuning a TM Head. It was pretty simple. There are a couple of bolts behind the prop. You loosen the bolts and tap on the skeg with a rubber mallet and find the sweet spot. You need to put the TM on continuous and cycle through the numbers till you lose vibration. Just find the video on YouTube.