Re: 9.9 Johnson Carb Question

[optsyeagle]

I can’t say it will fix your problem but if I was having a slow idle problem I would definitely remove the welch plug and the slow speed needle bearing and clean them cavities out well and replace them with new ones. It is not difficult to do and the parts are maybe worth $10 in total. Keep in mind that the slow speed needle bearing is made of plastic and plastic parts are not fond of carb cleaner. A little is fine but maybe someone soaked that thing in carb cleaner over a few days. Not sure a plastic bearing would hold up well with that. In any case, just replace it. Might as well replace the retainer needle valve as well. It is also made of plastic and is critical to maintaining a good seal. If air sucks past that it will never idle well.