New BAD habit on the 1772
 

This past weekend, the 1772 started with a new habit. It seems to be fuel related. When I am starting it, the engine turns over and fires as it should. However within the first few seconds after it starts and I release the key switch from the starter position, the engine begins to misfire drop in rpm and stop. I initially thought I thought the throttle was set too low in speed, so I increased it to 1/2 way. Tried again, the engine reacted the same way. OK, I pushed the throttle to 3/4 and tried again, same results - 2 times. Now, I tried it again at full throttle, sort of the same, ran rough for a few seconds then straightened out. I was able to mow the lawn without a problem. After I finished mowing, I shut it down to clean off the deck. When done it restarted with the same difficulty I was initially having.
I threw new filters and a new fuel pump at it. Same story...... What's left? How does a bad injection pump react?

If it's not fuel I would see if the coil is grounding out through a bad wire/connection some where

This is the Kubota diesel, not a gas, unless you mean somethin besides the ignition coil

ooops, nope - that's what I meant-sorry

sounds like air in the system, did you bleed everything in proper procedure after you replaced the pump?
Got an old perkins 6-354 that likes to pick up air after sitting a spell.
:bigthink:

Yes, I did bleed it, but you know sometimes a pocket of air can find a good spot to hide. I'll bleed it again and see if it starts better. Thanks, George.

It sounds like you had the problem to start with.
try cracking the lines one @ a time right @ the injectors to maybe bleed off any air.
Hopefully it is that simple, but maybe J. Mech will have some suggestions or others that have more experience with those jay-pan 'injins
Have heard of rebuilding pumps and injectors on those, but not the norm. :bigthink:

Hopefully I can get to it tonight. I did not want to do any of this in the pouring rain last night.

Is the fuel pump running when the key in the run positon

Yes it is, but I swapped it out anyway.