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Jan 23rd, 2013
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weird vibration!! #10653873 02/27/15 11:24 PM
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andyr21 Offline OP
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Ive got a 92 skeeter 18.5 ft with a 95 evinrude 150. Freshly rebuilt motor. Took it out today continuing the break in process and when i accelerate the motor starts to shake and it shakes the whole boat. A few times i guess i had the trim in just the right spot and it didnt vibrate at all, it shot out of the hole and scooted on. It has a 21 pitch prop. On a side note this is my first bigger boat with tilt/trim. Could it just be that i have to figure out the trim better? Or what could it be?

Re: weird vibration!! [Re: andyr21] #10653914 02/27/15 11:44 PM
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heybaylor Offline
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trim should not effect the motor shaking.
probably you have a plug fouling a little
You said you were breaking it in , is it double oiled ?


heybaylor
Re: weird vibration!! [Re: andyr21] #10653963 02/28/15 12:06 AM
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andyr21 Offline OP
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Yes it is double oiled. All plugs look fine. Theyre new along with wires. Spark has been tested and its perfect.

Re: weird vibration!! [Re: andyr21] #10654150 02/28/15 12:57 AM
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UncleJed Offline
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Is that prop in good shape? Any dings or anything that could make it un-balanced???

Re: weird vibration!! [Re: andyr21] #10654173 02/28/15 01:01 AM
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hopalong Online Content
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prop is bent or prop shaft problem.

put boat in N and key out, spin prop as fast as you can and watch the center to see if it spins off center.

send prop to steve and trade for at least a 23 or 24, 21 is too low for a 150 on a 18.5 boat imo




lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
Re: weird vibration!! [Re: andyr21] #10654371 02/28/15 01:49 AM
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Ricky Taylor Offline
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prop too small. need more cupping


PB: 11.49 - Joe Pool - 3/10/18
Re: weird vibration!! [Re: andyr21] #10654374 02/28/15 01:50 AM
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andyr21 Offline OP
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The prop does have a few dings but I didn't think it would make a difference. My mistake. That's good to know. I had already planned going for a 24 pitch as soon as I get the funds, 1400 dollars on rebuilding the motor hurt me for the time being. I do appreciate the info guys!

Re: weird vibration!! [Re: andyr21] #10658649 03/01/15 06:30 PM
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BassHunter 69 Offline
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Check the fly wheel !


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Re: weird vibration!! [Re: andyr21] #10663540 03/03/15 01:46 PM
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RickS Offline
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If you didn't have this issue prior to rebuild I would have to suspect something related to the rebuild. Good luck! I would take it back to engine builder.

Re: weird vibration!! [Re: andyr21] #10663554 03/03/15 01:51 PM
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Team Brown Stripe Offline
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Does it do it if you rev it up in neutral? If so it isn't a prop issue.


Youtube video of my tired old fishin motor on the Dyno thumb
https://www.youtube.com/watch?v=RiI-UfMEUw0
www.XtremeMarine.us


Re: weird vibration!! [Re: andyr21] #10664559 03/03/15 07:35 PM
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andyr21 Offline OP
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I rebuilt it myself. Turned out the carbs were full of trash causing it to spit and sputter and shake the motor which in turn vibrated the boat. After a good carb cleaning shes running beautifully. I still need a 24p prop but the 21p will get me by for now. Thanks for all the input!

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