Re: Johnson Seahorse (JW-10) not sucking...
It's alive... or at least appears to be from the couple minutes I dared run it at 11:30pm in the snow. It ran at what seemed about correct RPMs, and didn't die when I touched the throttle - and I was running it with my thumb in place of the expansion plug.
It was itstippy's urging about cleaning under the expansion plug that led to the solution, even though the problem wasn't there.
Since I was taking the expansion plug out, I wanted to be sure that gas was getting from the float bowl/high speed needle valve area to the expansion plug area also. The area under the expansion plug? Clean as a whistle.
The area below the high speed nozzle, where the float chamber drain screw is - and where the passage leading up to the low speed jets/needle are? A small flat bit of something - didn't come out in a soak with carb cleaner or spraying with carb cleaner, or blowing with air... but loose enough to move around.
My hypothesis - it would lay flat in the bottom of the chamber until fuel flow would start it moving. Sometimes it wouldn't restrict fuel flow at all, sometimes moderately, sometimes completely - and likely ever changing. That it was it sort of ran, and then would die.
Hopefully tomorrow I can test it some more, and make sure it is really working - I also hope the auto parts store next to my place of employment can come up with a replacement expansion plug, because I don't want to search every boat parts source in the area... and none of the mail order places are going to sell one by itself.
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aborgman
It's alive... or at least appears to be from the couple minutes I dared run it at 11:30pm in the snow. It ran at what seemed about correct RPMs, and didn't die when I touched the throttle - and I was running it with my thumb in place of the expansion plug.
It was itstippy's urging about cleaning under the expansion plug that led to the solution, even though the problem wasn't there.
Since I was taking the expansion plug out, I wanted to be sure that gas was getting from the float bowl/high speed needle valve area to the expansion plug area also. The area under the expansion plug? Clean as a whistle.
The area below the high speed nozzle, where the float chamber drain screw is - and where the passage leading up to the low speed jets/needle are? A small flat bit of something - didn't come out in a soak with carb cleaner or spraying with carb cleaner, or blowing with air... but loose enough to move around.
My hypothesis - it would lay flat in the bottom of the chamber until fuel flow would start it moving. Sometimes it wouldn't restrict fuel flow at all, sometimes moderately, sometimes completely - and likely ever changing. That it was it sort of ran, and then would die.
Hopefully tomorrow I can test it some more, and make sure it is really working - I also hope the auto parts store next to my place of employment can come up with a replacement expansion plug, because I don't want to search every boat parts source in the area... and none of the mail order places are going to sell one by itself.
--
aborgman