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#11757012 - 08/03/16 03:11 PM 2013 Mercury 115 Optimax
Catfish676 Offline
Outdoorsman

Registered: 04/20/14
Posts: 171
Loc: Fort Worth
Greetings-

I am a new owner of this motor and have two questions for any of you in the know.

1. It has the stock aluminum prop. What is the best stainless for 75% holeshot increase and 25% top end increase. Its pretty much a holeshot dog now.

2. The throttle is pretty much non-responsive through the first 50-60% of engaging it. You almost become unsure if its even hooked up properly until it finally responds. Id really like it to be alot more responsive and smooth through the whole handle starting shortly after it goes in gear. Any ideas or advice on someone near Fort Worth who can help with this issue?

Thanks folks!

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#11757372 - 08/03/16 06:31 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Muzzlebrake Offline
Extreme Angler

Registered: 12/26/14
Posts: 1614
Loc: Euless
What boat is it on and how much does the boat weigh, boat length ?
Also what pitch is the prop now?
_________________________
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!


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#11759052 - 08/04/16 04:55 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Catfish676 Offline
Outdoorsman

Registered: 04/20/14
Posts: 171
Loc: Fort Worth
Its on a 2103 Tracker PT190 that weighs about 1100lbs. How can I determine the pitch? Thanks!

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#11759062 - 08/04/16 05:00 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Catfish676 Offline
Outdoorsman

Registered: 04/20/14
Posts: 171
Loc: Fort Worth
Here is a photo close up to the inside...

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#11759064 - 08/04/16 05:01 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Catfish676 Offline
Outdoorsman

Registered: 04/20/14
Posts: 171
Loc: Fort Worth
Does that help? Sorry, I just dont know much about props...

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#11759084 - 08/04/16 05:20 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
bronco71 Online   content
Extreme Angler

Registered: 02/05/06
Posts: 1404
Loc: Farmers Branch/Sulphur Bluff
that is a 21 pitch, what are your rpm's at WOT (wide open throttle)?

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#11759187 - 08/04/16 06:18 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Catfish676 Offline
Outdoorsman

Registered: 04/20/14
Posts: 171
Loc: Fort Worth
I need to check it again but i remember thinking it was where i read that it should be, so probably about 5800.

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#11759190 - 08/04/16 06:19 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Muzzlebrake Offline
Extreme Angler

Registered: 12/26/14
Posts: 1614
Loc: Euless
Originally Posted By: Catfish676
Its on a 2103 Tracker PT190 that weighs about 1100lbs. How can I determine the pitch? Thanks!


You may be over propped.
According to this your would be better off with a 17" to 19" pitch on a 115hp
https://www.mercurymarine.com/en/us/propellers/selector/#/step-five
_________________________
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!


Top
#11759211 - 08/04/16 06:31 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
bronco71 Online   content
Extreme Angler

Registered: 02/05/06
Posts: 1404
Loc: Farmers Branch/Sulphur Bluff
I don't remember if that Opti is large or small hub....I have a 17 pitch Mercury Vengeance SS prop (large hub) for sale that you could try first but it will need a Flo Torque hub to slip in it. But if you are turning 5800 rpm with that 21p you should try a 21p or a 19p SS prop, the 17p will probably hit the rev limiter......

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#11759252 - 08/04/16 06:58 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
2015fordnut Offline
Extreme Angler

Registered: 06/24/09
Posts: 1835
Loc: Garland, TX
Call Josh or Steve they will point you in the right direction.

http://www.stevescustomprops.com/
_________________________



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#11759964 - 08/05/16 09:17 AM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Muzzlebrake Offline
Extreme Angler

Registered: 12/26/14
Posts: 1614
Loc: Euless
I ran a 3 blade 15 on my old 115 for pulling skiers and a 19 was the most pitch I could run and still get 5200 rpm. 17p was best all around 3 blade. This was on an old 172 Glastron.
_________________________
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!


Top
#11760216 - 08/05/16 11:36 AM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Catfish676 Offline
Outdoorsman

Registered: 04/20/14
Posts: 171
Loc: Fort Worth
Thanks to everyone for responding. I think I may start by consulting with Josh or Steve. If there is interest, I will post my findings.

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#11760227 - 08/05/16 11:43 AM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Catfish676 Offline
Outdoorsman

Registered: 04/20/14
Posts: 171
Loc: Fort Worth
Also, does anyone have any ideas on the throttle responsiveness issue? Thanks kindly.

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#11760814 - 08/05/16 06:13 PM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
kingdad101 Offline
TFF Guru

Registered: 10/24/05
Posts: 20735
Loc: W.F. Texas
I'm guessing when you get the right prop, that will be taken care of..too much prop will cause it to take for ever to get the RPMs going...
_________________________

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#11767090 - 08/09/16 09:47 AM Re: 2013 Mercury 115 Optimax [Re: Catfish676]
Catfish676 Offline
Outdoorsman

Registered: 04/20/14
Posts: 171
Loc: Fort Worth
10-4 thanks kindly.

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