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Discussion Starter · #1 ·
I have had my Brutus to my dealer many times for starting issues after letting it sit for 24 hrs in 65 degree shop, Battery checked ok, Glow plugs all check ok, New fuel filter, Fuel pump pressure check good, Still today if you leave it set for overnight go to start it it will not start even if you let the glow plugs cycle 2 to 3 times, when it does start it acts like starves for fuel or sucking air, then runs rough for few seconds then dies if you cycle the glow plugs again sometimes it starts up then smooth's out even had it smooth out start out the drive way to pasture and it dies. go through the start up again it will start up and run rough then smooth's out Then as it gets warm up it will run all day and not give me another problem all day part it in the shop start up the next morning sometimes it runs smooth sometimes it goes through the same thing over and over till it runs smooth and gets warm.
anyone having this issue with Polaris of Bobcat?
 

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Is it reasonable to assume your Polaris dealer hasn't dealt with many diesels?

That sounds very frustrating, also sounds somewhat like Ketchn's issue?

  1. Try opening the fuel tank cap when you leave it overnight.
  2. Does your dealer have a fuel injector tester?
  3. Checked the entire fuel system for pinhole leaks?
I bet if you brought a copy of the service manual "Chapter_04_Fuel_System.pdf" to a good diesel mechanic, she could solve this in a few hours.
 

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Discussion Starter · #3 ·
Fuel cap checked out ok, Injectors check ok , no pinholes seen, Also a note loss of power that's why we change the fuel filter no difference seen. I have been through the service manual with two Diesel mechanics found all checked out fine. we think it is a pump. Unfortunately my local Polaris dealer is now no longer a Brutus dealer and now I have to take my Brutus over 277 miles to the next closest dealer for warranty work. This is a major piss me off with Polaris.
 

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Terrys
Your discription is exactly what mine was doing.
My bobcat dealer didn't know what to do so they called Bobcat and suggested changing the fuel filter and now it has no problems and runs like a dream. I don't know if that was my problem or they messed with something's else, but that's 2 machines with the exact same problem. It also drives much better after they put the new command lever fix into it.
I wonder if replacing the command lever with the newly designed one, adjusting the hydrostatic system and throttle cables fixed it.
I did notice that as the hard starting after sitting all night started getting worse, the machine started having less power.
See if they can do the field repair fix for the command lever, that requires them to adjust the hydrostatic, throttle system and see if that helps.
Anyone that is having no speed on hills or can't go 30mph on the level needs to insist the dealer does the FREE field repair for the command lever.
 

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Has to be a leak causing the system to bleed down over night and have fuel supply problems when running.

Possibly around the fuel filter gasket which is why replacing it solved the issue for Ketchn.
 

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I have had my Brutus to my dealer many times for starting issues after letting it sit for 24 hrs in 65 degree shop, Battery checked ok, Glow plugs all check ok, New fuel filter, Fuel pump pressure check good, Still today if you leave it set for overnight go to start it it will not start even if you let the glow plugs cycle 2 to 3 times, when it does start it acts like starves for fuel or sucking air, then runs rough for few seconds then dies if you cycle the glow plugs again sometimes it starts up then smooth's out even had it smooth out start out the drive way to pasture and it dies. go through the start up again it will start up and run rough then smooth's out Then as it gets warm up it will run all day and not give me another problem all day part it in the shop start up the next morning sometimes it runs smooth sometimes it goes through the same thing over and over till it runs smooth and gets warm.
anyone having this issue with Polaris of Bobcat?
Check the fuel filter, it has a built in water separator. You might need to simply drain the water.
 
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