m610

wrkinaml · Mar 19, 2013

my 610 will not stay running.it has a zenith carb l63v. I believe, this is my first bobcat and I could use a little insight on my problem. ty

SkidRoe · Mar 20, 2013

How long does it run for before it quits? Does it sputter at all before quitting or does it just die?
Could be an ignition or fuel problem.

wrkinaml · Mar 20, 2013

SkidRoe said:
How long does it run for before it quits? Does it sputter at all before quitting or does it just die?
Could be an ignition or fuel problem.

you can play with throttle and keep it running for a little while. sometimes it just sputters a little then dies. I just finished pulling carb apart cleaning it and I am reassembling now. Also I could use some info. on float setting.

OldMachinist · Mar 20, 2013

wrkinaml said:
you can play with throttle and keep it running for a little while. sometimes it just sputters a little then dies. I just finished pulling carb apart cleaning it and I am reassembling now. Also I could use some info. on float setting.

wrkinaml · Mar 21, 2013

thank you for all the help . I put carb together and back on . Started it up it ran alittle while then died, like it ran out of fuel. Started looking around at fuel pump (it's mechanical) it has this little arm at the base of it which has a spring attached to it . If I move this rod back & forth a little, it stay's running. So do I need to replace fuel pump ?

6brnorma · Mar 21, 2013

wrkinaml said:
thank you for all the help . I put carb together and back on . Started it up it ran alittle while then died, like it ran out of fuel. Started looking around at fuel pump (it's mechanical) it has this little arm at the base of it which has a spring attached to it . If I move this rod back & forth a little, it stay's running. So do I need to replace fuel pump ?

If you can manually operate the pump....the problem is likely in the primer or the cam lobe that pumps the primer. I always go electric to bypass pump, primer and lobe problems. If you need an electric pump number let me know and I can give it to you in a couple of days.

wrkinaml · Mar 22, 2013

6brnorma said:
If you can manually operate the pump....the problem is likely in the primer or the cam lobe that pumps the primer. I always go electric to bypass pump, primer and lobe problems. If you need an electric pump number let me know and I can give it to you in a couple of days.

Yes sir I will need that#, if that's the best way to go. And thanks to all that helped.

craigb93 · Mar 22, 2013

wrkinaml said:
Yes sir I will need that#, if that's the best way to go. And thanks to all that helped.

I put a Carter P4070 on mine with a 20 amp fused power supply from the battery and a trigger from the ignition coil to a $6 Power Relay. Wiring Diagram on the relay package. Relay and pump available from Summit Racing -- on line order, 3 day delivery. -Dick

wrkinaml · Mar 22, 2013

craigb93 said:
I put a Carter P4070 on mine with a 20 amp fused power supply from the battery and a trigger from the ignition coil to a $6 Power Relay. Wiring Diagram on the relay package. Relay and pump available from Summit Racing -- on line order, 3 day delivery. -Dick

Thank's Dick. I went and ordered them parts today. I will let you guy's know in a couple of day's how this all turns out. Once again thankyou for all the help. John

6brnorma · Mar 23, 2013

wrkinaml said:
Thank's Dick. I went and ordered them parts today. I will let you guy's know in a couple of day's how this all turns out. Once again thankyou for all the help. John

I've had flawless performance from NAPA's # P60504 rotary style pump for at least 10 years on six machines.....wired to "accessory" leg of starter switch. Carter looks good also.

6brnorma · Mar 23, 2013

6brnorma said:
I've had flawless performance from NAPA's # P60504 rotary style pump for at least 10 years on six machines.....wired to "accessory" leg of starter switch. Carter looks good also.

Looks to me like that P60504 is made by Carter for NAPA?????

wrkinaml · Mar 26, 2013

6brnorma said:
Looks to me like that P60504 is made by Carter for NAPA?????

Thank you ,I've been checking out my options & hearing from friends here in Wi. I've been told to just replace the mechanical pump. Still unsure on what I should do.

SkidRoe · Mar 28, 2013

wrkinaml said:
Thank you ,I've been checking out my options & hearing from friends here in Wi. I've been told to just replace the mechanical pump. Still unsure on what I should do.

I vote for the electric pump. I have one on my 440b, as the mechanical pump with the siphon system that this machine uses leads to hard starting and burnt out starters. With the electric pump, I turn the key on, wait about 5 seconds for the pump to prime, then hit the starter. Easy start every time. The mechanical pump only runs when the engine is turning, and does not have much capacity at low rev's. Based on the Wisconsin's suseptablity to vapour lock, I would go with the electric pump. 6brnorma has a whole fleet of M610's with electric pumps.... FWIW

jerry · Mar 28, 2013

SkidRoe said:
I vote for the electric pump. I have one on my 440b, as the mechanical pump with the siphon system that this machine uses leads to hard starting and burnt out starters. With the electric pump, I turn the key on, wait about 5 seconds for the pump to prime, then hit the starter. Easy start every time. The mechanical pump only runs when the engine is turning, and does not have much capacity at low rev's. Based on the Wisconsin's suseptablity to vapour lock, I would go with the electric pump. 6brnorma has a whole fleet of M610's with electric pumps.... FWIW

the electric is the way to go on a 610 too, the only way they will start quick with the mechanical pump is if you put a outboard motor primer bulb in the line for cold starts.

Cyclone Ranger · Nov 3, 2014

jerry said:
the electric is the way to go on a 610 too, the only way they will start quick with the mechanical pump is if you put a outboard motor primer bulb in the line for cold starts.

For those of you replacing the mechanical pumps on your gas engines I'd recommend adding an oil pressure switch to shut the pump off when the engine is not running. One scenario in which this could be important is in a rollover. In this scenario, the engine dies, the carb needle is open and the fuel pump continues to pump gas onto a hot exhaust system. I see a lot of charred Bobcats for sale. I hope that none of us will ever be caught in one.

Tigerhaze · Nov 4, 2014

Cyclone Ranger said:
For those of you replacing the mechanical pumps on your gas engines I'd recommend adding an oil pressure switch to shut the pump off when the engine is not running. One scenario in which this could be important is in a rollover. In this scenario, the engine dies, the carb needle is open and the fuel pump continues to pump gas onto a hot exhaust system. I see a lot of charred Bobcats for sale. I hope that none of us will ever be caught in one.

I have a 610 that I am getting ready to do this conversion, and had two questions. The first question is that I have read elsewhere (maybe even on this site) that it is important to keep fuel pressure lower for the Wisconsin VH4D (I believe it may be 4-5 psi) so having an inline pressure regulator seemed to be important. Can you verify if this is an important consideration? The other question I had is that you can either hook up the electric fuel pump independent of the mechanical fuel pump or in series as a booster- what has those that have undergone the conversion done? Thanks.

Tazza · Nov 4, 2014

Tigerhaze said:
I have a 610 that I am getting ready to do this conversion, and had two questions. The first question is that I have read elsewhere (maybe even on this site) that it is important to keep fuel pressure lower for the Wisconsin VH4D (I believe it may be 4-5 psi) so having an inline pressure regulator seemed to be important. Can you verify if this is an important consideration? The other question I had is that you can either hook up the electric fuel pump independent of the mechanical fuel pump or in series as a booster- what has those that have undergone the conversion done? Thanks.

Using the oil pressure sender that way is quite clever.

jerry · Nov 4, 2014

Tazza said:
Using the oil pressure sender that way is quite clever.

If you use the oil pressure sender as a shut off won't you lose the priming advantage of a electric pump though? On mine with the mechanical pump I put a outboard motor bulb in the line so for the first start of the day I could fill the carb. Electric would have been nice for that purpose. Just a thought.

OldMachinist · Nov 4, 2014

jerry said:
If you use the oil pressure sender as a shut off won't you lose the priming advantage of a electric pump though? On mine with the mechanical pump I put a outboard motor bulb in the line so for the first start of the day I could fill the carb. Electric would have been nice for that purpose. Just a thought.

You could run another wire from the starter solenoid so the electric pump will run while cranking but be controlled by the sender after starting.

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