4110 with Yanmar overworked/smoking?

2001 JD4110 · Apr 12, 2012

Hey everybody:thumbsup: Glad to find the forums! I've owned 10 yrs.(since new) and well taken care of. 1050 hrs. I was cutting a neighbors super high grass last fall on her wicked terrain front yard. While under an extreme load all of a sudden started pushing excessive black smoke out exhaust

. I finished the yard but really was extra careful. I plowed thru the winter which was very light

It seems now I'll get a good puff whenever I engage the deck..sucks, I know. Now I may be using it to help my sister put in a lawn too...prolly gonna smoke like a b8tch once I start workin 'er in the dirt! what might have happen? cracked ring or burnt valve? I never worked on diesel, only gas. Thanks ps 3TNE74-ejk

rsewill · Apr 12, 2012

Welcome to the forum!

I have a feeling all you were seeing is unburned fuel from lugging. You probably don't have a real problem given your description of the work you have done since. Just avoid lugging.

2001 JD4110 · Apr 12, 2012

Thanks I hope so but not confident haha! I'll have to get out and cut the long to see how she does, then report back...

Raw Dodge · Apr 13, 2012

Your getting plenty of fuel.....as evidenced by black smoke...id check your air filter,and replace it if theres any chance it got wet or is dirty,Sometimes a clean looking filter is actually pretty restrictive...if your air filter is dirty,and you continue to load the engine heavily for long periods of time,you run the risk of melting a hole in a piston or melting/dropping a valve...a steady trail is haze/light smoke under heavy load is normal,continous black smoke is an overloaded engine or air filter issue...the 3tn 74 is a great engine but not exactly a powerhouse depending on what your doing you may be at its limit....

2001 JD4110 · Apr 23, 2012

Raw Dodge said:
Your getting plenty of fuel.....as evidenced by black smoke...id check your air filter,and replace it if theres any chance it got wet or is dirty,Sometimes a clean looking filter is actually pretty restrictive...if your air filter is dirty,and you continue to load the engine heavily for long periods of time,you run the risk of melting a hole in a piston or melting/dropping a valve...a steady trail is haze/light smoke under heavy load is normal,continous black smoke is an overloaded engine or air filter issue...the 3tn 74 is a great engine but not exactly a powerhouse depending on what your doing you may be at its limit....

Wow, you nailed it! I still think she'll blow some excessive exhaust, but I did check the air filter and it's done! Gonna swing by the dealer and get one, Thanks for the tip!:thumbsup:

2001 JD4110 · Jun 3, 2012

Raw Dodge said:
Your getting plenty of fuel.....as evidenced by black smoke...id check your air filter,and replace it if theres any chance it got wet or is dirty,Sometimes a clean looking filter is actually pretty restrictive...if your air filter is dirty,and you continue to load the engine heavily for long periods of time,you run the risk of melting a hole in a piston or melting/dropping a valve...a steady trail is haze/light smoke under heavy load is normal,continous black smoke is an overloaded engine or air filter issue...the 3tn 74 is a great engine but not exactly a powerhouse depending on what your doing you may be at its limit....

just thought I'd report back, Thanks so much for the exact diagnosis!:thumbsup: have used considerably since changing air filter and "not overloading" haha and everything is okay.