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Dec 30th, 2023
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 Poor Performance
#5940306
03/11/11 04:11 AM
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Joined: Jan 2009
Posts: 951
Hunter's Dad
OP
Pro Angler
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OP
Pro Angler
Joined: Jan 2009
Posts: 951 |
I have a 2005 Triton 176 Magnum with a 115 Yamaha 2 stroke. It has a 22 pitch stock prop on it that was worked on last year. Lower unit was changed about 3 years ago.
Boat is only hitting 43 MPH GPS at 4900 RPM WOT.
I know the boat is capable of more than that and am pretty sure it was much faster when I got it 5 years ago. I cant remember for sure but it seems the performance might have dropped about the same time I got the new lower unit. I didn't have a GPS before so I'm not sure. Rarely on some days with the right chop and right amount of gas in the tank I can hit 46-47. I have tried moving the motor up and down but didn't get any better results. I am sure this boat could hit 50 with the right setup.
Any suggestions?
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Re: Poor Performance
[Re: Hunter's Dad]
#5940624
03/11/11 07:22 AM
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Joined: Jul 2010
Posts: 13,507
GarySHO
Ice Ice Baby
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Ice Ice Baby
Joined: Jul 2010
Posts: 13,507 |
You are not turning enough rpm. I would check my linkage to make sure that my throttle plates were opening up all the way when you have the throttle wide open.
![[Linked Image]](http://i1359.photobucket.com/albums/q784/GarySHO/myspace-graphic-funny022_zpsfe2f4386.jpg) A vote is like a rifle; its usefulness depends upon the character of the user- Theodore Roosevelt Broken Bow Lake Fishing Guide 2020 Caymas CX 20 PRO and 250 SHO Hochatownfishingguide.com Originally Posted by Allison1 All hail Trump, no matter what.
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Re: Poor Performance
[Re: GarySHO]
#5941246
03/11/11 03:07 PM
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Joined: Aug 2006
Posts: 7,186
steve@S2Marine
TFF Celebrity
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TFF Celebrity
Joined: Aug 2006
Posts: 7,186 |
who worked the prop?
and was it done at the same time the lower unit was changed?
could be the prop needs to be "retuned"
S2 Marine 714 S. Main Quitman, Tx. 75783 www.s2marine.coms2marinesales@gmail.com Blazer Boats, Excel Boats, Sun Chaser Pontoons, Thor boats, Legend Craft Boats
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Re: Poor Performance
[Re: steve@S2Marine]
#5941417
03/11/11 04:02 PM
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Joined: Jan 2009
Posts: 951
Hunter's Dad
OP
Pro Angler
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OP
Pro Angler
Joined: Jan 2009
Posts: 951 |
The prop was worked on last year the lower unit 3 years ago. There were a few dings in it. Local guy did it. Didn't ask him to change much. I told him the problem I was having.
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Re: Poor Performance
[Re: Hunter's Dad]
#5941434
03/11/11 04:04 PM
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Joined: Jan 2009
Posts: 951
Hunter's Dad
OP
Pro Angler
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OP
Pro Angler
Joined: Jan 2009
Posts: 951 |
More info: As I trim up the motor I get top speed at 4900 RPM. If i keep trimming up the RPM goes up to 5400 but i lose speed to 41 mph.
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Re: Poor Performance
[Re: Hunter's Dad]
#5942219
03/11/11 07:19 PM
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Joined: Aug 2006
Posts: 7,186
steve@S2Marine
TFF Celebrity
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TFF Celebrity
Joined: Aug 2006
Posts: 7,186 |
sounds like the cupping was ground out of the prop.
send it to me and i'll evaluate it and call with estimate.
i can fix your problem.
steve.
S2 Marine 714 S. Main Quitman, Tx. 75783 www.s2marine.coms2marinesales@gmail.com Blazer Boats, Excel Boats, Sun Chaser Pontoons, Thor boats, Legend Craft Boats
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Re: Poor Performance
[Re: Hunter's Dad]
#5942627
03/11/11 09:10 PM
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Joined: Aug 2006
Posts: 7,186
steve@S2Marine
TFF Celebrity
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TFF Celebrity
Joined: Aug 2006
Posts: 7,186 |
got it. 
S2 Marine 714 S. Main Quitman, Tx. 75783 www.s2marine.coms2marinesales@gmail.com Blazer Boats, Excel Boats, Sun Chaser Pontoons, Thor boats, Legend Craft Boats
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Re: Poor Performance
[Re: steve@S2Marine]
#5942810
03/11/11 10:12 PM
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Joined: Mar 2009
Posts: 172
melz
Outdoorsman
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Outdoorsman
Joined: Mar 2009
Posts: 172 |
Steve what is the turnaround time to go over my prop Iam in calif so would have to ship it Thanks
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Re: Poor Performance
[Re: melz]
#5943763
03/12/11 03:14 AM
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Joined: Nov 2008
Posts: 1,560
BassHunter 69
Extreme Angler
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Extreme Angler
Joined: Nov 2008
Posts: 1,560 |
If this started when the lower was replaced ( I'm asking here) could it have a different gear ratio? I am not sure if different ratios are available for that size motor. But it would seem to match the change in performance.
Field Staff for Wicked Weights (Tungsten Done Right!)
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Re: Poor Performance
[Re: BassHunter 69]
#5947458
03/13/11 03:58 PM
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Joined: Jan 2009
Posts: 951
Hunter's Dad
OP
Pro Angler
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OP
Pro Angler
Joined: Jan 2009
Posts: 951 |
Rajin Cajun, I have wondered the same.
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