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Dec 30th, 2023
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 Have you heard of this..
#4294359
12/28/09 12:29 AM
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Joined: Jan 2003
Posts: 977
Crappie Cat
OP
Pro Angler
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OP
Pro Angler
Joined: Jan 2003
Posts: 977 |
99 merc 125 has a vibration at idle
and at slow speed but not at 1/4 to full
throttle .Owner says its the weight of the prop the same as the flywheel. Is this BS?
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Re: Have you heard of this..
[Re: Crappie Cat]
#4294390
12/28/09 12:35 AM
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Joined: Apr 2002
Posts: 2,753
marktx
Extreme Angler
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Extreme Angler
Joined: Apr 2002
Posts: 2,753 |
I had a 96 merc 75 that was the same way when i replaced the prop to stainless and had to take it back and have it tuned. After that it was ok, still had a slight vibration but not very noticeable. They said with the extra weight it would make a difference from the aluminum i had on it. Im sure maybe steve at csp if thats the name can chime in on a better explanantion of it.
mark
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Re: Have you heard of this..
[Re: marktx]
#4295761
12/28/09 07:30 AM
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Joined: Nov 2009
Posts: 770
Performance Outboards
Pro Angler
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Pro Angler
Joined: Nov 2009
Posts: 770 |
Yes B.S. The 115 only runs on two cylinders untill about 1800 rpm.
Call & Arrange your powerhead re-build today! I can work with trade-ins & I'll give you more for your core! Need a boat mechanic to come to you? I'm a Mobile Marine Tech. also. Call & schedule today! 281-312-9856
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Re: Have you heard of this..
[Re: Performance Outboards]
#4295762
12/28/09 07:31 AM
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Joined: Nov 2009
Posts: 770
Performance Outboards
Pro Angler
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Pro Angler
Joined: Nov 2009
Posts: 770 |
115-125 same motor same carbs. runs on two untill 1800.
Call & Arrange your powerhead re-build today! I can work with trade-ins & I'll give you more for your core! Need a boat mechanic to come to you? I'm a Mobile Marine Tech. also. Call & schedule today! 281-312-9856
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Re: Have you heard of this..
[Re: Performance Outboards]
#4295817
12/28/09 10:58 AM
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Joined: Sep 2008
Posts: 121,182
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 121,182 |
I have had props out of balance that would cause vibration, more noticable on a 3 blade.
" Hop, set the hook"!
hopalong 99,999
TexDawg 99,999
FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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Re: Have you heard of this..
[Re: hopalong]
#4295858
12/28/09 12:37 PM
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Joined: Jan 2003
Posts: 977
Crappie Cat
OP
Pro Angler
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OP
Pro Angler
Joined: Jan 2003
Posts: 977 |
So is it a prop issue or ?
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Re: Have you heard of this..
[Re: Crappie Cat]
#4296021
12/28/09 02:23 PM
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Joined: Jan 2005
Posts: 21,773
Pat Goff
TFF Guru
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TFF Guru
Joined: Jan 2005
Posts: 21,773 |
Like told before, below 1,800 rpms it's only running on two cylinders, and shakes like a wet dog, when it's running on all four it smooths out. Most prop/shaft other vibrations get worse as rpms increase.
So, if it goes away when the two cylinders kick in, there's your answer.
Pat Goff Seadrift TX ![[Linked Image]](https://i.ibb.co/X48Kbbq/scooter-shallow.jpg)
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