17.5 Briggs running rough

Hi. I have a 17.5 hp in my John Deere D100. It was running great but just started doing this. I can't figure out what's wrong. I tried to attach a video but the forum wont let me add an mp4. The motor starts, runs good for a few seconds, then starts sputtering and blowing black smoke. When it does this the governor moves back and forth. It will do that for a few seconds then go back to normal and the governor stabilizes. Any help would be appreciated.

You need to post the model, type and code of the engine? (if you want precise answers)

what kind of choke does it have? Automatic or manual?

sgkent said:

what kind of choke does it have? Automatic or manual?

Click to expand...

Sounds like choke is hanging up momentarily, then recovering and running right.

zukimud said:

I tried to attach a video but the forum wont let me add an mp4.

Click to expand...

Post it up on youtube. Link it here for us to view.

zukimud said:

then starts sputtering and blowing black smoke.

Click to expand...

Means a rich condition. Carb needle sticking open or choke not locked open once warm/hot. Pressure test the carb needle/seat at 7psi for 30 minutes. Many a youtube video on how to pressure test carb needles.

Pull the oil dipstick and smell for fuel. If you smell gas, report back here. AND do NOT run the engine if you have diluted oil inside the crankcase. Fix the fuel issue and dump the oil a couple times.

I would clean/renew the entire fuel system. Clean and flush the tank like a new one. New fuel line from the tank to the carb. New filter and shut off valve are good items to install. Make sure you have a solid flow of gas AT the carb inlet. Drain into a glass jar.

Guessing water in the gas. Drain the tank into a jar and look for water in the bottom. This fits your condition to a T.

Dude ghosted us.

Must have found the problem!!!
Doug Lee
*

Masini de brodat Brother sunt apreciate pentru precizie, fiabilitate și abordarea lor tehnologică modernă. Producătorul oferă o gamă largă de modele — de la masini de tesut compacte pentru uz casnic, până la sisteme profesionale cu ecran tactil și suport pentru designuri USB.
Caracteristici principale:

1.alimentare automată și tăiere automată a firului;
2.ecran color cu vizualizarea modelului;
3.sute de designuri și fonturi integrate;
4.compatibilitate cu formate de broderie computerizată.

Aceste mașini permit realizarea broderiilor de orice nivel de complexitate — de la elemente decorative până la logouri și inscripții pe haine.
Poți cumpăra o masina
de brodat Brother atât pentru uz casnic, cât și pentru un atelier profesional. Magazinul online Overlock oferă o gamă variată de modele. Prețul mediu al unei mașini de brodat Brother variază între 12 000 și 50 000 lei, în funcție de funcționalitate.