1948 td-20

[ArmyRanger]

i have a 1958 TD-20. i have fuel "spiting" from the hole in the center of the "Y" between the needle valve and the fuel line. how do i prevent/fix this or is this normal? the motor will only start and run in the "fast" position. if you drop the throttle to start or slow it dies out. i have been unable to find any information on the rebuild kit for this year other than ill have to make the gaskets. i have a 1957 JOHNSON 5.5 HP OUTBOARD MODEL CD-14. will the needle packing and various other gaskets work anywhere in this carb?

 

[F_R]

Re: 1948 td-20

By spitting, do you mean like sneezing? That is caused by being too lean. Not enough fuel or too much air for the amount of fuel. That Y leads to a rotary valve. The needle in it is the slow speed mixture adjustment. It should be open very close to 5/8 turn. The high speed mixture adjustment is the wheel on the tank.

Obviously, the carburetor on that thing bears no resemblance whatsoever with your 1957 5.5 and nothing is interchangeable. There is no rebuild kit and never has been one.

The TD, TN, and related models were extremely popular. They also were very different than more modern motors. They were a third port powerhead with a rotary valve. No reeds. Lots of history there if you want to get into learning it.

EDIT: They need at least 65 pounds of compression or they won't start and run well.

 

[ArmyRanger]

Re: 1948 td-20

i mean while it is running fuel is spiting out. not horribly bad but enough i noticed it. i will double check the compression and i will adjust the idle needle and give it a try. i was using the initial settings from my 57. thanks for the reply and ill re-post when i have made the adjustments and see what happens. thanks again.