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Old 08-22-2007, 04:39 PM
LawnInOrder LawnInOrder is offline
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walker with 16hp kolher

heres my problem. I am not getting fuel from the gas tank to the carb. I broke down the carb and cleaned it out since it was sitting for 4 years It has a mechinacal fuel pump between the tank and carb. when i take the fuel pump off the motor and pump the fuel pump by hand it works but when it is bolted up to the motor it doesn;t get fuel to teh carb. This machine has been sitting for 4 years. What do you gusy think? Let me know.
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Old 08-22-2007, 06:04 PM
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Restrorob Restrorob is offline
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Sounds like the pump diaphragm is hard, It's working in your hand because you are giving it more stroke than the lobe does. Or it could be a worn lobe.
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Old 08-22-2007, 06:07 PM
LawnInOrder LawnInOrder is offline
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how would you test to see if it the diaphram or a lobe. Thanks
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1996 Mitso Fuso Stake Body
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Old 08-22-2007, 06:09 PM
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First what model engine is this ?
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"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
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Old 08-22-2007, 06:11 PM
LawnInOrder LawnInOrder is offline
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Quote:
Originally Posted by Restrorob View Post
First what model engine is this ?
its a 16 hp magmum kolher
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1986 Mack 6 Wheeler
2002 Mitso Fuso Crew Cab Mason Dump
2000 Mitso Fuso Mason Dump
1996 Mitso Fuso Stake Body
1999 Dodge 2500 w/ 7.5' Western Plow
12X6 Enclosed Trailer
12X6.5 open Trailer
16X6.5 Bobcat Trailer
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Bobcat 873
Bobcat 753-For Sale
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Old 08-22-2007, 06:23 PM
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Thats what I had in my mind, You can remove the plug(s) then stick a standard screw driver into the pump hole touching the cam then rotate the engine by hand and watch how much movement you have on the handle.

There are no specs on this but you should get a good idea if it is moving enough to activate the pump.

Is this a M or MV, Single or twin ?
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"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
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  #7  
Old 08-22-2007, 06:27 PM
LawnInOrder LawnInOrder is offline
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this is a single.
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1986 Mack 6 Wheeler
2002 Mitso Fuso Crew Cab Mason Dump
2000 Mitso Fuso Mason Dump
1996 Mitso Fuso Stake Body
1999 Dodge 2500 w/ 7.5' Western Plow
12X6 Enclosed Trailer
12X6.5 open Trailer
16X6.5 Bobcat Trailer
20 Ton Bobcat Trailer
Bobcat 873
Bobcat 753-For Sale
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  #8  
Old 08-22-2007, 06:35 PM
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The above check will apply, I have seen a couple with worn lobes but I would lean toward the pump. You could take the pump apart just to check after you check the lobe but they no longer sell rebuild kits that I know of.
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You never learn anything until you admit you don't know it all...

"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
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  #9  
Old 08-22-2007, 06:42 PM
LawnInOrder LawnInOrder is offline
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when i take the diaphram apart what do i look for: something broken, torn, scratched?. also how much do these pumps usually go for? thanks
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1986 Mack 6 Wheeler
2002 Mitso Fuso Crew Cab Mason Dump
2000 Mitso Fuso Mason Dump
1996 Mitso Fuso Stake Body
1999 Dodge 2500 w/ 7.5' Western Plow
12X6 Enclosed Trailer
12X6.5 open Trailer
16X6.5 Bobcat Trailer
20 Ton Bobcat Trailer
Bobcat 873
Bobcat 753-For Sale
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  #10  
Old 08-22-2007, 07:03 PM
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A new pump is in the $70.00 range, The diaphragm should be soft and pliable not hard and stiff.
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You never learn anything until you admit you don't know it all...

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