Adding pulse pump to a generator

[Rye]

I had a small Honda inverter generator years ago that had a pulse pump and it allowed me to add a longer fuel intake line and just drop it in a fuel jug instead of having to fill the low capacity tank that was mounted on the genny. I recently bought a chinese knockoff, but it doesn't have a pulse pump.

Given there's enough clearance, can I just tap the valve cover and add a barbed nipple to run the pump? I think that's the crankcase ventilation hose already attached to the valve cover in the picture so I don't think that can be used. I'd rather not tap the crankcase
so I figured I can get the same pulse from the valve cover.

[Burgerman]

I would have thought the pulse came from the intake port.
If the crankase ventilation works well there shouldnt be much pulse.

[Rye]

I would have thought the pulse came from the intake port.
If the crankase ventilation works well there shouldnt be much pulse.

The crankcase ventilation has a one way diaphragm built into the valve cover so I would think there should still be enough pulse to run the pump...in theory. I don't know because I've never done it. I could pop out that diaphragm and use the ventilation hose, but I don't know if the crankcase would get proper ventilation doing that.

I saw some guy bought a metal oil dipstick plug with a barbed nipple adapter which would be the best way to do it without damaging the small engine. However, I haven't been able to locate one. Another guy tapped the valve cover on a small pressure washer (although not as small as my genny) and seemed to be successful.

I think I've decided for test purposes, though, that I'm going to buy a PVC plug that fits the oil cap. Then drill it and install a 1/4" barb fitting. I don't know how well PVC holds up against oil, but this is just an experiment... I don't want or need to be lifting fuel cans so I'd like to get this rigged up.

I own a welding machine that has a pulse pump and that's how I fuel it. It's too big and inefficient to use when the power goes out though.

[Burgerman]

The crankcase ventilation has a one way diaphragm built into the valve cover so I would think there should still be enough pulse to run the pump...in theory. I don't know because I've never done it. I could pop out that diaphragm and use the ventilation hose, but I don't know if the crankcase would get proper ventilation doing that.

It wont. Crankase ventilation is there to remove any pulse, or it would pop out seals etc. Piston displaces the same CC as the engine in/out. The fact that it seems it has a diaphram would not allow it to work properly. So you may be mistaken and its just an oil trap - sometimes a larger volume, or a maze so oil drains back while the engines blow by gasses that pass the piston rings can escape without the oil. Or it would smoke and burn oil. If a breather is too small you will get a weak pulse. If its big enough to work well you will get a very weak pulse.

The carb has a diahram pump. That runs from the intake port pulses.