1435 John Deere mower

[Mark Poss]

I have a 1435 John Deere mower with yanmar 3cyl. Diesel engine that has recently began smoking while under a load. I am not familiar with Diesel engines. I inherited this mower from my dad and have used it to cut grass for 15 years small acreage the mower has only 1400 hours. When I first started cutting grass it would go through grass 6 inches tall as fast as it would go without bogging down or smoking. Now it smokes just going up a slight incline in short grass. Just replaced the fuel filter, changed oil and air filters with no change. Could the injectors need cleaning or replacing? Or do I have major issues? Thanks for any help, Mark

 

[Mike M]

Would not hurt to have the injectors tested and adjust the valve clearance. Dad has a JD 750 with a Yanmar 3 cyl. engine and they recommend every 500 hrs to test them. I think about 1500 hrs. they needed new tips ? Ours has not been used as much in years and likely way over due too.

 

[Mark Poss]

Thank you

 

[Roger in Iowa]

Clean air filter and still smoking could be blocked or restricted air somewhere..
It is black smoke?

 

[Mark Poss]

Yes black smoke

 

[wore out]

Yes black smoke

Mark, have you made any progress with diagnosing and repairing your 1435 since last July?

I have one with similar low power and smoking issues, I plan to test the injectors, but I'm suspecting the engine is going to need an overhaul.

I will do a compression check, as well.

 

[Mark Poss]

I’m sorry I forgot to tell you guys that I found that the hose going into the air filter was restricted. Cleaned it out and now it runs like a champ! Thanks for all the replies!