61 johnson 3hp wont run slow?

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seahorserepair

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Have a 1961 johsnon 3hp seahorse model jw-17. I just redid the headgasket and cleaned the carb. replaced the coils and rest of the electrical a few years back. while adjusting the slow speed i cant seem to get the motor to idle slow. ive pre set both the needles to the initial settings that i found on this forum which has worked wonders in the past. i got the high dialed in but no matter how much adjusting on the slow i cant get it to stay running when it hits the arrow just before the word slow. any help would be a great help.
 
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tx1961whaler

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Re: 61 johnson 3hp wont run slow?

When you cleaned the carbs, did you remove the welch plug on top of the carb and clean the tiny, low-speed passages? Those are easy to miss.
 
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seahorserepair

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Re: 61 johnson 3hp wont run slow?

thanks... no i did not. that will be my next task before i mess around with the needles again. I'll post my results when im finnished.
 
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tx1961whaler

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Re: 61 johnson 3hp wont run slow?

OK.
Hopefully you have the carb kit with the replacement plug. They can't be re-used once taken out.
 
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seahorserepair

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Re: 61 johnson 3hp wont run slow?

That did the trick. Pulled the plug and cleaned it out nice. had some trouble finding where i put the one from the new kit.... dont normally take the whole carb off to clean but now it runs better then ever. thanks.
 
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tx1961whaler

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Re: 61 johnson 3hp wont run slow?

Yep. Those are tiny little holes under there and they clog very easily.
 
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