30hp carb settings

[mantis270]

I’m working on a 1987 30hp J30ECUB and am about to get everything together once a few more parts come in. Found that the plastic sleeve that contacts the cam and controls the throttle was flat on one side and was not rolling.

Once I get that replaced, could someone lend some guidance on the appropriate settings for the carburetor. It’s been thoroughly disassembled, cleaned and rebuilt.

 

[Crosbyman]

it is an old style with a carb fix jet for the HS and a needle for LS you can adjust

just gently seat the needle closed and back it out 1.125 turns ... warm up the motor adjust mid way between rich and lean a bit on the richer side

 

[mantis270]

What about the stop on the throttle control rod and the position of the cam follower with respect to the throttle? I bought this motor used a few years ago and it’s always been “finicky”.

 

[Crosbyman]

generally the cam has a mark on it. (look closely for the 2 small spikes) the mark should meet the cam follower just as the throtlle opens when the throtlle is at START.

to line up cam and cam follower there are nuts underneath which you can loosen and pull out or push in the cam

unfortinately I do not have the Maint. manual so experts here can possibly post a picture

see a video .. abit long... on adjusting a 25 hp