johnson 9.5

patreed

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Oct 6, 2009
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3
help;I have a johnson 9.5 sereal # c461955. What year would it be? It has had a tune up but it dosn,t perform well.like it is only runing at 1/2 throutle.What are the carb. adjustments for this engine?
 

JB

Honorary Moderator Emeritus
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Mar 25, 2001
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45,907
Re: johnson 9.5

Model number??
 

F_R

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Jul 7, 2006
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28,226
Re: johnson 9.5

help;I have a johnson 9.5 sereal # c461955. What year would it be? It has had a tune up but it dosn,t perform well.like it is only runing at 1/2 throutle.What are the carb. adjustments for this engine?

Adjust the carburetor all you want to. It won't help. The adjustment knob is for idle mixture.

90% of 1/2 power is because it is running on 1/2 of the engine. In other words it is running on one cylinder. Check the compression, spark plugs, and ignition system.

The other 10% when it comes to a 9.5hp is inhaling smoke. If it runs correctly with the hood off, that's it. Also, a 9.5 won't run with the hood on in a barrel.
 

crxess

Chief Petty Officer
Joined
Apr 30, 2009
Messages
559
Re: johnson 9.5

Follow F_R's advice. Probably points need adjustment or replaced.
Also Get a carb kit and do a thorough cleaning/rebuild. High speed orifice may be restricted.
 

patreed

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Joined
Oct 6, 2009
Messages
3
Re: johnson 9.5

the model #on the tag is no. 110. I had the engine in for a coplete tune up...coils,points,wires and plugs.and no improvment.
 
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