Johnson 9.9hp dies under load

[jweymarn]

Hiya!
Please help! See video of the problem. It stalls when loaded.

Is this 100% a carb issue or should I check something else first?

I've already replaced the sparkplugs and it is running on brand new pure fuel.

Any help appreciated! If you have links to how-to videos on this model I send you a virtual high-five!

 

[timguy]

Nice video. Fuel starvation. Did it start after a storage period? Try pumping squeeze bulb while running, to see if that helps. Then we direct our attention accordingly. Tim

 

[jweymarn]

Hi Tim! Yeah, the boat had a very rough winter before this. Cold temperatures came early and I wasn't able to get to the boat in time. So it froze stuck to the beach. Meaning, before this video the engine had spent 5 months frozen outside. Started on the third pull .
I tried pumping the squeeze bulb but it did not help.

 

[racerone]

Compression test is first item.-----Then see if spark can jump a gap of 3/8" or more n a test device.----Open low speed mixture screw 1/4 turn and test run.----Sure there is no water in the carburetor ??

 

[timguy]

Also wanna check lower unit lube. Did you run the gas out of the carb? Sure it's non oxy?