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Ok quick update, I removed the carbs yet again and removed the core plugs. The three little holes in each throat were clean. When I removed the bowls one of them had a tiny amount of trash that wasn’t there when I cleaned them previously so it seems as if it’s coming from upstream somewhere...

I’m going to remove the core plugs and double check everything again this week. Maybe there’s something in the carbs I’ve just not gotten out yet.

I soaked the carbs for 24 hours then used small wires to clear the sludge out of the jets and the tiny tube for idle that runs through the emulsion tube and also made sure the 2 sets of holes through the side of the emulsion tube was clear. I then used carb cleaner to spray through everything...

Morning update: Checked motor side of fuel pump, no fuel bypassing diaphragm. Disconnected carb linkage and began adjusting low speed needles, no change, motor will idle 5-10 seconds and die without the primer on. Added air box lid and adjusted low speed needles again, same result. When I make...

Also I’m running the motor in a barrel to give the back pressure similar to a lake. The motor won’t idle long enough to adjust the low speed needles before it dies without the primer turned on.

Also when I say the fuel bulb is still firm I mean it’s not sucked flat like they do when there’s a fuel line collapsing. It’s not as hard as when I first prime it.

Pappy, thank you for the reply and extra items to check. The throttle roller isn’t touching the cam when it’s at idle position. I’ll remove the carb linkage in the morning and see if anything changes. I’ll also check the back of the fuel pump to see if any is getting through the diaphragm...

I’m not sure how to go about checking the crank seals but if you tell me I’ll be sure to inspect them.

Motor help! I recently got an ‘89 Johnson 48spl for my jon boat,it lived its life on a pontoon until it wouldn’t run correctly and the older couple removed it and put a newer motor on it, that’s all the history I know on it. I’ve torn down the carbs and they was sludged up, cleaned them so...