Running issue

[Chopped50ford]

I have a Cat 400 and its got a Briggs 3.5 HP engine.

Im not very clever with these motors, but the engine starts up smoothly, but dies under load.

I have new gas, good oil and a clean air filter.

Any possible suggestions for me to check to get this running good.

Thanks!

 

[FlyinSparky]

spark plug breaking down under load?

i have a thread in here with the issues i was having with my briggs and i changed the plug to another used one i had and seemd to fix the issues i was having.

just a thought.

 

[Chopped50ford]

I always say, go back to the basics. Ill check that out. For some reason, I never though of that and it could be fouled.

Thanks!

 

[FlyinSparky]

hah ya basics. it only took me 4 weeks of tinkering and LOTS of cussing to think of trying a different plug:doah:

 

[milo raptors]

haha we all make mistakes the plug has made isues for me like that on all my engines but i always check basic first so i find its the plug after a minute or 2

 

[Chopped50ford]

Cleaned plug and still the same issue.

It almost seems like the choke is stuck...but after removing the air cleaner, the choke appears to be working perfectly.

Still Stumped!

 

[FlyinSparky]

get a brand new plug! i cleaned my plug for 4 weeks and had issues. and today i rode all day on a new $2.50 plug the plug could be broke down internally giving it bad performance.

replace the plug and see if the performance improves if not try adjusting the carb?