BX2200 losing rpm and blowing smoke under load

[Flynifr]

I'm stumped. My BX2200 with 1600 hours has started acting up. When at full power and under load babe engine loses RPMs and starts blowing dark smoke. If I back off on the hydro I can keep it going. Happens mostly when mowing at full throttle, low range and uphill which is a significant load. Also when trying to pull a box blade but not as severe. I changed he fuel and filters with no luck. Air filter is ok also. Thought maybe it was an injector problem so I tried cracking the injector lines and found that cracking the middle cylinder made no difference in the engine but cracking the front or back cylinder made the engine sputter so I thought I had a bad injector. To test this theory I swapped the injectors. Same problem, cracking the line on the middle cylinder makes no difference. If it was a bad injector I would expect the symptom to follow the injector. I also don't seem to be getting fuel spurting out of the middle injector line. Is it possible that one channel of the injection pump has failed? I removed the injector lines and blew them out with no change.

Unless someone has more advice I'm going to have to get he injection pump checked out. To save some money I would like to pull the injection pump myself but can't find any instructions. I'm assuming it is mechanically driven and don't want to screw anything up removing it. I may also replace the injectors since I assume they are original to the tractor and 1600 hours is a good run. They cost $98 each so. I assume they aren't worth rebuilding. The injection pump is over $700. Are they worth rebuilding or should I just buy new?

 

[Daren Todd]

try disconnecting the fuel line from injector and pump and hit it with some air and see if the lines blocked. Then hook back to injection pump, diconnect lines from all injectors and see if it seems like your getting the same amount of fuel to each injector.

 

[D2Cat]

If you end up getting into the injection pump and injectors I'd suggest give a call to Oregon Fuel Injection. I talked to Don in service. 541-773-8669. I could get a pump from them for an L305 shipped to my door in 5 days for just a tad over 1/2 of kubota price, brand new no core charge. They also have injectors, but I didn't need any. Good luck.

 

[Daren Todd]

It is very possible that the port has gone bad. I had a port plugged with fungus and crud on mine. Was able to unscrew the top and remove the spring, and bleed some fresh fuel through it. Was suprised by the amount of crap that came out of it. Not sure how easy it would be to remove the pump. Some are keyed, some have a gear and have to be timed. I usually just farm out the ones that have to be timed. Good luck