Johnson 150 poor idle ,fuel usage extremely high

A

apcibillb

Recruit
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Sep 27, 2009
Messages
3
I have a 1994 Johnson Strike king 150 and have poor idle and high fuel usage,
compression good , plugs new,power pack new, fuel filter new, no spitting of fuel back out of carbs, and no flooding over of fuel as I can see when idling, no hesitation, mid and top end runs fine, does not start hard
at idle is rough and can smell fuel , and uses fuel big time
 
M

mikesea

Lieutenant Commander
Joined
Oct 1, 2006
Messages
1,830
Re: Johnson 150 poor idle ,fuel usage extremely high

just for starters,the red lever on the primer ,is it in the off position,not at a 90 degree angle to the primer,chgeck for leaking hoses,there ar lots to check ,have someone squeeze the ball as you closly look
 
A

apcibillb

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Sep 27, 2009
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3
Re: Johnson 150 poor idle ,fuel usage extremely high

red knob straight up and down not in manual position and choke not staying on
 
K

KILLERME

Cadet
Joined
Sep 27, 2009
Messages
11
Re: Johnson 150 poor idle ,fuel usage extremely high

have a look down throat of carbs whil running, you might see eccessive fuel going into motor, if so, will be main float needle faulty, stuck open.
 
SparkieBoat

SparkieBoat

Captain
Joined
Aug 17, 2009
Messages
3,643
Re: Johnson 150 poor idle ,fuel usage extremely high

my money is on a needle valve..one of the carbs is flooding.
 
A

apcibillb

Recruit
Joined
Sep 27, 2009
Messages
3
Re: Johnson 150 poor idle ,fuel usage extremely high

thanks for the advise , i will try rebuilding all the carbs ,I did check to make sure gaskets on idle circuit side not swelled and did have the proper brown gaskets installed , but so far never seen any accessive flow of fuel down the carbs while running with arrestor cover off, will let you know if I find something, thank you again
 
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