Re powering my boat and have a few questions

Borgey401

Petty Officer 2nd Class
Joined
Jun 11, 2011
Messages
155
My 15' runabout currently has a 25 HP Johnson outboard on it. I want to upgrade the motor to a higher HP since I feel it's not enough. Plus the hull is rated for up to a 60 HP motor. I have been thinking that around 40-50 HP would be perfect for what I want to do. I have been checking craigslist daily and can't seem to find a motor around this HP. Well I found a Johnson earlier that's in my price range but is a 35 HP. Will I even really notice a difference between this motor and my current one? But then again I was aiming for a 40 HP when re powering and that's pretty close. Just wanted to get some others opinions on how much of a difference the 10 HP will make. Any input on this situation is greatly appreciated.
 

Bob_VT

Moderator & Unofficial iBoats Historian
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May 19, 2001
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26,065
Re: Re powering my boat and have a few questions

10 hp not much difference at all. IMO you should hold out and keep shopping for at least a 40 and anything above that would be even better.

I would save up and keep looking......... people will be unloading motors soon.
 

chrome dome

Petty Officer 1st Class
Joined
Sep 24, 2010
Messages
303
Re: Re powering my boat and have a few questions

IMO you won't notice much of a difference between the 25hp and the 35hp because they will both struggle to get the boat to plane,

try and keep looking for a motor that is rated as close to the hull rating as possible coz that's...allegedly..what the boat was designed for,
 

Borgey401

Petty Officer 2nd Class
Joined
Jun 11, 2011
Messages
155
Re: Re powering my boat and have a few questions

Yeah that's what I figured. I had a feeling the 10 HP would not make much of a difference at all. Looks like I'll waiting for a 50-60 HP.
 

JB

Honorary Moderator Emeritus
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Mar 25, 2001
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45,907
Re: Re powering my boat and have a few questions

I have found the best all-round power is about 70% of the rated power, Borgey. That would be a 40-50HP for your boat.

It would be small enough to get good economy, light enough to get good handling and powerful enough to plane her to within a couple of mph of what a 60HP would do.
 

Home Cookin'

Fleet Admiral
Joined
May 26, 2009
Messages
9,715
Re: Re powering my boat and have a few questions

also, you would be trading a known motor for an unknown motor with unknown problems, for little benefit.

Look for a 48 special, too. They are good motors, and are really 50's.

The Yamaha 50 is a good motor, if you can find one. Maybe someone else powering up. Leave word at local shops; you might get the trade-in. Many dealers won't take in old motors unless they know they have a sale.

Your 25 will be a very desirable motor, so don't sell it cheap, and consider hanging on to it.
 
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