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#10831606 - 05/09/15 08:37 PM what is the difference
leanin post Offline
TFF Celebrity

Registered: 08/18/09
Posts: 5672
Loc: TEXAS
I have a 99 merc 40 horse elpto.. the powerhead for ther 40 thru 60 hp are the same,, the reed block is the same, and the motor is a 3 cylinder.. I took carbs of to clean and compared size of reed block mounting hole and carb venturi and they are the same size. 1.5 inches. what im wanting to do is try and make the motor a 60 hp. The carbs show different PN from 40 to 60 but I dont know what the difference is, maybe bigger bowls on the 60? anyone ever try 60 hp carbs on a 40?
I had a 65 hp evinrude and put 75 hp carbs on it and it ran super strong and idled great.
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JESUS CHRIST IS THE WAY, THE TRUTH. AND THE LIGHT. !!!! PUT ALL YOUR TROUBLES IN JESUS HANDS, YOU WILL SEE WHAT HE CAN DO.

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#10831717 - 05/09/15 09:30 PM Re: what is the difference [Re: leanin post]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11220
Loc: Littlefield Tx & Lake A. H. US...
I am thinking their is some difference in the piston porting on the 60hp too. Carbs just different jetting.
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The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD

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#10831807 - 05/09/15 10:11 PM Re: what is the difference [Re: leanin post]
leanin post Offline
TFF Celebrity

Registered: 08/18/09
Posts: 5672
Loc: TEXAS
those 20 extra horses would make a big difference on a 19 foot aluminum boat
_________________________
JESUS CHRIST IS THE WAY, THE TRUTH. AND THE LIGHT. !!!! PUT ALL YOUR TROUBLES IN JESUS HANDS, YOU WILL SEE WHAT HE CAN DO.

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#10831818 - 05/09/15 10:15 PM Re: what is the difference [Re: leanin post]
leanin post Offline
TFF Celebrity

Registered: 08/18/09
Posts: 5672
Loc: TEXAS
is the jet in the bowl the main jet? the one on top is spring loaded and 2 turns out.
_________________________
JESUS CHRIST IS THE WAY, THE TRUTH. AND THE LIGHT. !!!! PUT ALL YOUR TROUBLES IN JESUS HANDS, YOU WILL SEE WHAT HE CAN DO.

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#10831856 - 05/09/15 10:48 PM Re: what is the difference [Re: leanin post]
leanin post Offline
TFF Celebrity

Registered: 08/18/09
Posts: 5672
Loc: TEXAS
IT looks like a 40 hp takes .044 / 052 jets and a 60 hp takes 058/ 060 jets I guess the worst that can happen is the motor might run too rich . I wouldnt think the idle circuit would be effected?
_________________________
JESUS CHRIST IS THE WAY, THE TRUTH. AND THE LIGHT. !!!! PUT ALL YOUR TROUBLES IN JESUS HANDS, YOU WILL SEE WHAT HE CAN DO.

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