Cub cadet UTV with Perkins 403c diesel running rough

I have a UTV with caterpillar/ Perkins 403c diesel engine loses power while driving and smokes, exhaust also has a hissing sound. Was wondering if it’s injectors or a more serious problem

From a glance those look ok with out a test. Dont smash the tips wheres the hossing sound coming from a plugged up spark arrestor perhaps

Thanks.I believe your right about the spark arrestor it was plugged up pretty bad I didn’t even think about that

Welcome to the Forums! Glad to have you. How do you like the diesel powered UTV? As soon as the right project comes along that I can "cough-cough" justify a UTV I want to buy one. Hard to justify one for a 1-2 acre site.

Thanks. I absolutely love it we got it new in 2006 it’s not built for speed like some of the newer UTV but is a workhorse i use it everyday on the farm . I sure do miss it since it’s been down

Tyler d4c said: From a glance those look ok with out a test. Dont smash the tips wheres the hossing sound coming from a plugged up spark arrestor perhaps Click to expand... Thanks.I believe your right about the spark arrestor it was plugged up pretty bad I didn’t even think about that

There’s a copper gasket that seals the bottom of the inj. to the head.. be sure to torque it down..usually 50-55ftlbs.. Squirt a little oil or some kind of liquid around the inj. while it’s running to check for compression leaks..

Did the spark arrestor screen fix the problem?

CM1995 said: Welcome to the Forums! Glad to have you. How do you like the diesel powered UTV? As soon as the right project comes along that I can "cough-cough" justify a UTV I want to buy one. Hard to justify one for a 1-2 acre site. Click to expand... yeah he had me at "cub cadet UTV with diesel" LOL.

The diesel in a UTV is a torquey SOB.. The only problem I’ve run across with them is, sitting for an extended period of time and the fuel going bad, sticking the plungers in the injection pump or freezing up the injectors.. THAT AND not changing the fuel filter a couple times a year.. allowing dirt/sand to enter the injection pump and wearing out the pumping plungers..

Mr. Wrench said: Did the spark arrestor screen fix the problem? Click to expand... It’s running great now . I also noticed two of the injectors were loose when I took them off not sure if that was part of it

Gossett695 said: It’s running great now . I also noticed two of the injectors were loose when I took them off not sure if that was part of it Click to expand... I had that same problem on a John Deere gator one time. It just wouldn't stay running. Start and die start and die. I checked fuel, air and all kinds of things. Had about decided that something was wrong inside the engine. Then one time after it died I heard a little hissing coming out of the exhaust system. That is when I found the spark arrestor screen was completely plugged!