39 9N engine sputters

[Ken(WI)]

I have a 39 9N with newly overhauled motor, new wiring harness, new generator and cut-out, rebuilt carb, new gas tank, new battery, new heavy duty ground strap, new radiator cap, new positive cable and more. The oil pressure is about 38, fresh oil and filter and new plugs with the proper gap. It starts like new and runs great in neutral at both low and high rpm. But; under any load the engine sputters and misses. It's not bad on a flat surface but even climbing a slight hill it almost stalls. It seems like a fuel problem to me. I have not tried to adjust it from how it was set when I got it back from the professional farm tractor mechanics who did the carb and generator. I would appreciate any suggestions anyone might have, before I light the workshop on fire.

 

[HCooke]

First check the firing order! 1, 2, 4, 3. CCW starting at 11:00 when looking at the front mount dist cap. Easy to get 3 & 4 reversed.

 

[Dell (WA)]

Ken........Keep yer itchy-twitchy fingers off'n them handy-dandy carb tweek'ums.

Sounds like you gottchur 4-nipple sparkies miss-wires. Firing order is 1,2,4,3 CCW. (ps the 4-nipple cap is usually labeled) Usually sparkies 4&3 gitt swapped. These N-Engines are SOOoooo goooood they will start and run on just 2-cyls. And NO, you have NOT hurt yer engine.

Howsomevers; ennytime you have "starting issues", change yer FLOODED sparkies......NO ARGUE!!!
Recommend AutoLite 437's gapped 0.025". Don't throw yer FLOODED sparkies away, just clean'n'dry them one-atta-time in HOT running engine. ........Dell, yer self-appointed sparkie-meister

 

[Ken(WI)]

Thanks for the advice. Hopefully I'll be able to try get this done on Tuesday and I'll let you know what happens.