1997 25 Johnson (3 Cyclinder)

Kamdyn

Kamdyn

Petty Officer 2nd Class
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Oct 25, 2009
Messages
100
I was playing with the throttle linkage (Screw) and it seems like I got more power, I was wondering If it will damage the motor If I leave it that way.
 
Kamdyn

Kamdyn

Petty Officer 2nd Class
Joined
Oct 25, 2009
Messages
100
Re: 1997 25 Johnson (3 Cyclinder)

Whatever that screw is called on the throttle linkage I got more HP out of the whole ordeal which am really happy about, I also read on the net that the 1997 25 Johnson has the same bore, carbs and the same displacement as a 35 Johnson?
 
A

AlanR

Petty Officer 1st Class
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Jul 14, 2006
Messages
310
Re: 1997 25 Johnson (3 Cyclinder)

Throttle linkage sounds like you just adjusted it so it opend the carbs more witch is a good thing,

as for the 25-35 theres most likely small diffrences like the 9.9 - 15, such as the exhaus outlet and such.
 
Kamdyn

Kamdyn

Petty Officer 2nd Class
Joined
Oct 25, 2009
Messages
100
Re: 1997 25 Johnson (3 Cyclinder)

I will post some pics tommorrow morning, I wonder if its the high speed idle jet that I adjust that feed more fuel to the carbs? Does anyone know if the 25 and 35HP are the same?
 
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boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 1997 25 Johnson (3 Cyclinder)

Depending on what screw you played with you might have messed with the wot timing. This is not good. Unless you want a hole in one of the pistons. Get an OEM manual and go through a sync & linc. The 25 hp is 30.5 cu " and the 35 is 34.5 cu " which makes them different. Hope this helps.
 
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