Re: 1957 Lark 35 hp

[chris-p]

What prop are you running? Another major factor. What height is the cav plate relative to the keel?

To tune the needle, start with the high speed. Go full throttle, then slowly, giving motor time to respond, turn the needle clockwise in small increments, until it wants to die or backfire. At that point back off needle 1/4 turn.

then go down to idle, and do the same. In small increments, giving motor time to respond, turn CW until it lean sneezes and wants to die, then back out 1/4 turn.

Take off dials, and re install with them pointing at each other. This is to know if they move in the future. tighten up packing nuts. You are done!