I got a small refund from Uncle Sam this week and I am planning on installing a mechanical fuel pump.  My question is whether I should go with the Assassin or Fuel Boss--what is the good, the bad, and the ugly of each.  I know these topics have been beat almost to death but if you can point me in a direction of an article that has already compared the two that would more than suffice.  I have searched through the different forums but I was hoping for a little bit more.

 

Thanks,

I am the same way when it comes to electric motors, hence the reason I went mechanical.  Simple and reliable.  Aside from catastrophic gear failure (which I haven't heard of anyone having out of a mechanical pump yet) every other part can be replaced right on the spot.   .And that only consists of a couple bearings, belt and I suppose you can count the pulleys. I know I can source the belt, and bearings locally and would almost put money on being able to cnc another pulley from remains of a destroyed one if needed.  In regards to the air/water separator, you can purchase the big rail mount kit from vulcan for around $160 or so (last I checked).

I went through this decision a year ago and would suggest throwing the MITUSA in the mix with the others. I was initially set on the Fuel Boss, but there was a wait for it and I had a dying LP. So I went with the MITUSA. It is a considerably simpler approach than the fuel boss. So much so the I thought parts were missing when I first unpacked. They assured me there wasn't , and I was quite skeptical if I had made the right decision. It doesn't keep the stock LP in the loop, but I don't consider that a big issue any more. I've had 12,000 mi of problem free operation and never think about it.

I kind of like the idea of keeping the eletric pump in line for priming bleeding air easier after filter changes. Makes it that much easier. Thanks for pointing out the MITUSA though. I hadnt heard of them. I guess I could always add a hobbs switch in later too. Thats not a problem.

I've got my fuel boss set up like the MITUSA, no hobbs switch. It works great but there's a half second till the pump really kicks in. For filter changes I just take out the dummy plugs on the carter pump and harness and reconnect them and bump the starter a whole bunch of times. I believe the MITUSA is the original and the other pumps are based off of it.

One quick question, where would one look for info and to purchase a MITUSA pump? I am not really seeing a website for them.

I also have an older Assassin pump. The thing has worked like a champ. It took a little work to purge all the hose debris after it was installed but once clean, the regulator works. I have only replaced the belt once. IMHO much better than an electric pump. I went through electric pumps like candy.

 

I have never needed a second, back up electric pump.

Edited March 18, 201411 yr by RPM

I got my MITUSA through Ultimate Transmission in Garden City , Idaho. I think they distribute them now but I was directed there by Opie (who makes the MITUSA). I would check his site opieparts.com too.

They sent a small pulley that you mount in a drill, throw the belt around and spin the pump to prime it. Pretty easy and quick.

The easy prime is an air hose into the filler neck for the lines to the pump.  After that one good round of a 10-15 second key turn has always brought fuel to the VP for me.

Alright guys. Decided to hold off on the mechanical pump for now. I did go ahead and order a Beans Diesel Sump though. Should let the raptor breath a little better at least. I figure it this way: If the raptor was gonna go out, I probably would have had issues with it already. Its over a year old and 20,000 miles on it just about. I have a good spin on prefilter before it and it is frame mounted too.

 

Thanks for all the input gentlemen. If I come across a good deal on a used mechanical pump in the future I might gobble it up but for now I am gonna hold off.

If it ain't broke.......Murphy's law will fix it for ya.  J/K. No point in spending money on something if it hasn't given you reason to yet.

Alright guys. Decided to hold off on the mechanical pump for now. I did go ahead and order a Beans Diesel Sump though. Should let the raptor breath a little better at least. I figure it this way: If the raptor was gonna go out, I probably would have had issues with it already. Its over a year old and 20,000 miles on it just about. I have a good spin on prefilter before it and it is frame mounted too.

 

Thanks for all the input gentlemen. If I come across a good deal on a used mechanical pump in the future I might gobble it up but for now I am gonna hold off.

I'm new to sumps, is the beans sump mounted underneath the tank or on top?

Last week was the first time I let the fuel gauge get below 1/8 tank and it starting sputtering as I pulled into the gas station. The sump is supposed to eliminate air getting sucked up right?

You drill a hole in the bottom of the tank and it mounts there. No straw, no tubes, just a hole in the bottom of the tank. Thats why you can literally run the thing dry with the sump.

 

Here is the install video:

 

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCgQtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DRfFM51j5rJU&ei=7zAzU5e3DYnOyAH8zIHYBw&usg=AFQjCNEwV1ZO3dJyljYAI8hix7IBJLahbQ

The only thing I would be worried about with an underside mount, is the seal.