Ever had this problem... need input please...

[ritamigo]

My 70hp johnson outboard had serviced, carb rebuild, plugs, fuel filter, gas lines, timing, water impeller and ran great. Then after about 4 months it started studdering at around 1200 to 1600 rpm but not WOT or higher RPM. However I found out that if I tilt it up the studdering goes away gradually. Miller's Marine said it could be a stuck carb float. Any input would be greatly appreciated. Other wise it seems to run great. Someone suggested a bad propeller?

Thanks for any help.

JoeVee

 

[EddiePetty]

Re: Ever had this problem... need input please...

I noticed in your list of serviced items that the fuel pump was not mentioned.

A couple of thoughts come to mind (especially since your problem is just over idle).

First would be a less than perfect fuel pump followed closely by a restricted transition port in the carburetor. A slightly sticking float needle would also be suspect.

 

[Faztbullet]

Re: Ever had this problem... need input please...

Its a flooding carb as when you tilt you change the float level. Look for a swollen needle and seat from ethanol, debris in seat from fuel line degrading internally or fuel pump diaphragm flaking