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1988 17 SSL - transom weight
johnstout
#1 Print Post
Posted on 08/10/17 - 8:37 AM
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I am looking at re-powering this boat. The plate says it will handle up to 100 hp. Will this transom handle the heavier 4 stroke 90 hp engines? As near as I can tell they weigh anywhere between 75 and 100 lbs more than the equivalent 2 strokes.

Edit: Corrected model name per guidelines, subject clarity


Edited by Phil T on 08/10/17 - 9:14 AM
 
Phil T
#2 Print Post
Posted on 08/10/17 - 9:10 AM
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The transom will handle over 400 lbs BUT the boat's trim will be adversely affected over 390.

All major brands offering a 90 hp motor (4 stroke and DFI) will work fine.


Edited by Phil T on 08/10/17 - 9:13 AM
1992 Outrage 17, 1992 Evinrude 115
 
JRP
#3 Print Post
Posted on 08/10/17 - 2:36 PM
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If you want to go to the max HP hull rating, a good option is the Honda 100, which comes in at 359 lbs for the 20" shaft.

Another good (possibly better) option is the Merc 90 Fourstroke, which is the identical weight as the Honda. The nice thing about this engine is that it is 2.1L (compared to the Honda 100 at 1.5L -- or 40% more displacement), so should have good torque in the mid-range.

If you are daring there is a 115 HP version of that same Merc engine at the same weight (but I do not recommend going over the max hull rating.)

 
johnstout
#4 Print Post
Posted on 08/10/17 - 3:12 PM
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I was leaning towards the Mercury anyway. My first outboard was a 1974 Merc 115 6 cylinder. It ran circles around my buddies 135 Johnson.

 
donp
#5 Print Post
Posted on 08/11/17 - 5:58 AM
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No issues in 29 yrs with my 1988 Montauks with 90hp (2 stroke) engine and a (4 stroke) 9.9 aux. The combo should weigh about 400lbs. That said, if you go the 90hp (4 stroke) I wouldn't suggest adding a aux. engine.

 
EJO
#6 Print Post
Posted on 08/11/17 - 7:48 AM
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I'm not a fisherman but what is trolling speed? The new 4 stroke can run pretty slow.
I of course have a smaller boat/motor combination but my idle is 1.3 knts. with the Merc 60HP


Skipper E-J
m/v "Clumsy Cleat" a 2008 Montauk 150
 
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