Re: Johnson HD-20 Won’t start

[marvk]

quote jsonova99:

Going back to the low speed, will these engines run with the high speed needle closed completely? Trying to think of a way to really isolate the low speed.

I have a HA-15 with the same carb setup. Yes, you should be able to start and run with the high speed needle completely closed. To start, low speed should be 3/4 to 1turn open. It should start at the low to mid spark advance setting. Mid to high setting you will need to start opening the high speed needle. My high speed setting runs best about 1/2 open. After it’s running, low speed setting is about 3/4 open. Remember also, the low speed adjusts the air flow, not fuel flow. Turning it in, will richen the mixture.