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Hello. my name is***** will assist you today.
Did you already clean the carb?
Would you please post the serial number of the engine?
Did you remove the carb and clean it or just spray cleaner through it?
Do you mean the needle vale that is on the side of the carb?
I have the diagram open.
Reading your extra info, The gap on the plugs is too much. It needs to be at .040.
does using the primer help the engine run better?
I am thinking that since this motor sat for a while, you have a plugged carb. Spraying cleaner through the throat is not doing anything but keeping it running. You will need to remove the carb and take it apart. Clean all of the passages including the jets and the accelerator pump.
The carb gasket kit includes all items except the needle that you will also need to replace. I can talk you through this process.
Was it the bottom one that was fouled?
I work on outboard engines every day. I am not just an online guy. I am a certified Mercury tech with a day job in a busy repair shop.
I am not guessing when I say that you need to remove the carb and clean it.
Do you want the carb kit and needle numbers?
Needle is 1395-803861
Kit is 9761 1
When you had it off, did you also replace the spring under the blue primer diaphragm?
Where is the mixture screw set at currently?
Ok, So I take it that the ball is still in there?
Is the motor sneezing when you throttle it up?
To both questions?
Did you replace the base gasket behind the carb when you had it off?
Can you back out the mixture screw slightly and make the engine idle more smoothly?
Do you know what the compression is on each cylinder?
that is pretty low. Is this an electric start motor?
How is the plug for the bottom cyl?
The rubber ring should have been on the back of the reeds, the gasket goes on the front side between the reds and the carb. When installing the gasket, make sure that the hole in the reed block aligns with the hole in the gasket. This is what provides the crank pressure to the fuel pump.