8 hp kohler fuel pump

[moe1965 744]

I just took off the fuel pump and to me it looks like something's missing is there supposed to be a arm that sticks off the back of the pump and goes in the engine to actuate the pump

[953 nut 55,744]

Nothing missing. The smaller engines used a "Pulse Pump" which moves the diaphragm by using the pressure change created in the crank case as the piston moves up and down.

[The Tuul Crib 7,337]

 There is an arm supposed to be on there that runs off the camshaft or not

 I always thought there was  

Edited December 9, 2018 by The Tool Crib

[953 nut 55,744]

These are the parts you will find in your pump. 

[KC9KAS 4,741]

41 minutes ago, The Tool Crib said:

 There is an arm supposed to be on there that runs off the camshaft or not

 I always thought there was  

 

42 minutes ago, 953 nut said:

Nothing missing. The smaller engines used a "Pulse Pump" which moves the diaphragm by using the pressure change created in the crank case as the piston moves up and down.

Vacuum/pressure operated pump.

[Elkskin's mower junkyard 1,117]

I just go visit Taryls shop he makes me a plate that's tapped and has a nipple in it and I run a Briggs pulse pump. Its his way of fixing it and all 4 of the round hoods are like this

[Elkskin's mower junkyard 1,117]

Don't know if you can see it. U need pump above the nipple or oil will get into pump.

[moe1965 744]

43 minutes ago, craftsmanmowerfreak said:

Don't know if you can see it. U need pump above the nipple or oil will get into pump.

Thanks I have heard of using this as a option to replace the fuel pump but have never tried it

[Elkskin's mower junkyard 1,117]

5 minutes ago, moe1965 said:

Thanks I have heard of using this as a option to replace the fuel pump but have never tried it

Works really good. On my k160 on the 753 it went from having to use spray to get it to start to one or 2 pulls with choke on. I have a 1958 bolens engine on the 753. The one in pic is the 8hp I put on the 552

[wallfish 17,078]

Contact member @buckrancher, Brian.

He was making replacement diaphragms for those original vacuum pumps

[953 nut 55,744]

If you only replace the diaphragm you can get a little extra life out of the check valves by removing the check valve plates and inverting them presuming this is the type valves you have. This is going to make them seat a bit better.