MOTOR HEIGHT & PROP

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04ProHawk180
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Joined: 05 Jul 2019, 13:50

MOTOR HEIGHT & PROP

Post by 04ProHawk180 » 05 Jul 2019, 14:14

Hello, I have a 04 Fisher Pro Hawk 180 with a 90hp Mercury outboard. I am taking the motor off to install power pole brackets and was wondering if I should install a hydraulic jack plate or just raise the motor up a few holes on the transom? Also what would be a good prop size? I currently am running a 21 pitch 3- bladed SS prop. I have been reading about the Mercury SpitFire 4-bladed prop but don't know what pitch to get. Any help would be appreciated. Thanks.

Xtremeboats
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DaleH
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Location: Eastern Mass

Re: MOTOR HEIGHT & PROP

Post by DaleH » 05 Jul 2019, 17:54

Try this to see what diamter & pitch to use.

http://forum.tinboats.net/viewtopic.php?f=4&t=37433

I run a few of their props, their 4-blade pressed aluminum, which is fantastic on smaller boats, and a big 4-blade stainless steel that is unreal on my 21’ offshore boat.

You plug in your boat & motor specifics, plus the actual weight carried into that calculator and on the 3 or more occasions I have used it on my own boats, the results have been perfect!

The best part is, they have a prop exchange feature to make sure you get exactly what you were looking for!
#1) 1st tin rebuild, 18' Lund http://forum.tinboats.net/viewtopic.php?f=21&t=36583
#2) 25' Parker refurb from EMPTY hull http://www.classicparker.com/phpBB3/vie ... p?f=15&t=6
#3) 16' V-tin rebuild http://forum.tinboats.net/viewtopic.php?f=21&t=36465
#4 Procraft SV14
#5) 16' Starcraft entirely NEW Transom Skins http://forum.tinboats.net/viewtopic.php?f=3&t=37548

Crazyboat
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Location: NJ

Re: MOTOR HEIGHT & PROP

Post by Crazyboat » 07 Jul 2019, 19:09

What RPM were you turning with the old prop? Going up a ":few holes" doesn't sound prudent unless you were way low to start with.

There's a guy called Prop god (named Ken) on a forum called Bandofboaters.com, he knows his stuff.

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jethro
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Re: MOTOR HEIGHT & PROP

Post by jethro » 09 Jul 2019, 09:00

Does the bracket change your motor setback by that much? How thick is the bracket? Does the Power Pole install instructions give you any guidance? If not I would consider calling them to see if they have any input.
I fish, therefore, I am.

1993 Starcraft SF 14 DLX side console with 25 hp Mercury 2 stroke
2003 Sylvan 2100 Profish walkthrough with 150 Mercury Saltwater and 6hp Mecury 4 stroke kicker

04ProHawk180
Posts: 2
Joined: 05 Jul 2019, 13:50

Re: MOTOR HEIGHT & PROP

Post by 04ProHawk180 » 13 Aug 2019, 10:30

jethro wrote:
09 Jul 2019, 09:00
Does the bracket change your motor setback by that much? How thick is the bracket? Does the Power Pole install instructions give you any guidance? If not I would consider calling them to see if they have any input.
The bracket is 1/2 inch thick.

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