I have bought a perry pump and a perry mixture control. The mixture control dose not have a needle to preset so you have full control of fuel flow with the radio. the setting on the pump is for fuel pressure. Have not run the boat yet . would also like some advice from some on that has used this setup.Perry-pump :
You'll have to make (drill/tap) a pressure-nipple on the engine.
You have to know how much fuel the engine is using ,
setting the pump-capacity of the Perry-pump is a painstaking job.
Another thing that can go wrong/break.
Been there.. done that . I'm NOT a fan.
Pipe-pressure :
You'll have to make (drill/tap) a pressure-nipple on the pipe and tank.
No pre-setting , just use a small-diameter (2mm - 5/64") silicone-tubing.
I have bought a perry pump and a perry mixture control. The mixture control dose not have a needle to preset so you have full control of fuel flow with the radio. the setting on the pump is for fuel pressure. Have not run the boat yet . would also like some advice from some on that has used this setup.Perry-pump :
You'll have to make (drill/tap) a pressure-nipple on the engine.
You have to know how much fuel the engine is using ,
setting the pump-capacity of the Perry-pump is a painstaking job.
Another thing that can go wrong/break.
Been there.. done that . I'm NOT a fan.
Pipe-pressure :
You'll have to make (drill/tap) a pressure-nipple on the pipe and tank.
No pre-setting , just use a small-diameter (2mm - 5/64") silicone-tubing.
I am running both inboards and outboards. The outboard could definetly use it. I dont like high mounted tanks, or hoppers. My K&B 3.5 with gold carb almost needs both.
I am wondering if those that have tried the standard fuel pump (non oscillating) are running the Perry diagram with the check valve and return line as the instructions outline???
There really shouldn't be too much pressure ever with this setup from what I can understand with using a return line past the carb. The pump only circulates the fuel, and forms a galley where the carb can draw from using a T fitting??
I'll be using Webra Dynamix carbs which require a pump. They are not a venturi style carb. Webra at one time even designed a backplate to fit their engines using the same style pump built into it??
JetPack: I am using third channel mixture control, but not mixed from the throttle channel. The mixing is not needed with the oscillating pump. This all sounds very interesting......... Even more complex than my set up........ How would you refuel the tank/s ????? I have a "Tee" connection on the line coming from my header tank to the pump for refueling. Also when I refuel I clamp off fuel line to the carb with a small hemostat to prevent flooding the engine...... maybe the regulating pumps have longer running life? At PerryPumps just now yours is also still available. Also my needle valve is from an OPS Carburator. It has a limited range of lean/rich, not full range like what sounds like what is needed for your system. It sounds like you already have all, or almost all the hardware. Try it!!! I would say reserve at least a full day and a gallon of fuel to get this sytem working at the pond......... If you do not already have everything some of these items may be hard to get.Perry's instructions outline a circuit that basically turns the pump into simply a circulating pump with a return line going back to the tank feed. The tank has a vent line with a check valve to not allow fuel to leave the tank, it only allows air into it.
The circulating line gets a T fitting, and a short length of fuel tube to the carb that it feeds off of.
If you try to run the pump straight line to the carb, it won't work. It develops too much flow, and makes the carb act as a fuel injector which it will fail at. This is what I was wondering if this is what was being tried with the people that didn't have good results.
I understand pipe pressure is probably the simplest form of getting fuel to the tank, but with me I have a set of Webras that cannont run without a pump due to the type of carb, and would even like to use a third channel on them. Here's the plumbing diagram that I worked out.
I havent tried running it yet, have no idea what luck I'll have.
With the osillating pump, that might be the better setup, but I have a few of the diaphram pumps I bought with the Webras. Is there any problems using a third channel mix with the osillating setup?
Getting back to the advantages and disadvantages, having to not install a pressure nipple in the pipe, and running a long line to a front mounted tank that can fill with water and spoil a tank of fuel if you flip. The pump system still has a vent that water can pass through to the tank but that line can be very short, and pointed or installed where water cant reach. Drawbacks of running the pump from case pressure is the case can let water into the pulse line to the pump which might have to be emptied before running it again, but at least it wont reach the fuel.
Another thing I can think of is the fuel delivery being better because the pump would be circulating all the time, even if the pickup is intermittent on a low tank.
I am setting up my boat with aK&B 7.5 IB with a rear drum roter. I have a K&B .450 carb with the low speed disk. I am going to use the perry pump set up with the returne line to tank with a check valve in line to tank and a refueling tap on feed line to pump to isolate carb and pump when refueling. I am going to try the perry in flight fuel control valve. Has any one used this fule control valve befor????JetPack: I am using third channel mixture control, but not mixed from the throttle channel. The mixing is not needed with the oscillating pump. This all sounds very interesting......... Even more complex than my set up........ How would you refuel the tank/s ????? I have a "Tee" connection on the line coming from my header tank to the pump for refueling. Also when I refuel I clamp off fuel line to the carb with a small hemostat to prevent flooding the engine...... maybe the regulating pumps have longer running life? At PerryPumps just now yours is also still available. Also my needle valve is from an OPS Carburator. It has a limited range of lean/rich, not full range like what sounds like what is needed for your system. It sounds like you already have all, or almost all the hardware. Try it!!! I would say reserve at least a full day and a gallon of fuel to get this sytem working at the pond......... If you do not already have everything some of these items may be hard to get.Perry's instructions outline a circuit that basically turns the pump into simply a circulating pump with a return line going back to the tank feed. The tank has a vent line with a check valve to not allow fuel to leave the tank, it only allows air into it.
The circulating line gets a T fitting, and a short length of fuel tube to the carb that it feeds off of.
If you try to run the pump straight line to the carb, it won't work. It develops too much flow, and makes the carb act as a fuel injector which it will fail at. This is what I was wondering if this is what was being tried with the people that didn't have good results.
I understand pipe pressure is probably the simplest form of getting fuel to the tank, but with me I have a set of Webras that cannont run without a pump due to the type of carb, and would even like to use a third channel on them. Here's the plumbing diagram that I worked out.
I havent tried running it yet, have no idea what luck I'll have.
With the osillating pump, that might be the better setup, but I have a few of the diaphram pumps I bought with the Webras. Is there any problems using a third channel mix with the osillating setup?
Getting back to the advantages and disadvantages, having to not install a pressure nipple in the pipe, and running a long line to a front mounted tank that can fill with water and spoil a tank of fuel if you flip. The pump system still has a vent that water can pass through to the tank but that line can be very short, and pointed or installed where water cant reach. Drawbacks of running the pump from case pressure is the case can let water into the pulse line to the pump which might have to be emptied before running it again, but at least it wont reach the fuel.
Another thing I can think of is the fuel delivery being better because the pump would be circulating all the time, even if the pickup is intermittent on a low tank.
Mike F.
called perry pumps and talked with them about using VP-30 pump with VP-IMO-05 in-flight mixture control. Thay told me that you should not need to use a return line to tank just run the line from pump to control valve. thay also said that the pump and valve should flow enough fuel to run up to a.90 engineMany airplane guys use it sucessfully. I have a couple too I'll be trying. Even though it is made of carbon-filled plastic, it seems to be very well made, and blowing through it, seems to have a good range.
Here's what a couple other guys are trying as far as the circuits. They show how they are re-fueling. I can't say how well the circuits themselves work.
Lots of people seem to be having a hard time figuring out what works best in their setups...
One thing that is very odd, and seems to add to everyones confusion including mine, is Perry Aeromotive sells both products...the pump and the control valve...but never explains how to use them in conjunction with each other...LOL!!! That drawing that I posted from myself is the only way I could think how to go about it without bad effects. What Mike said before, I best set aside a full day of testing and a jug of fuel.
dwilfong, do you have a set of instructions for setting the control valve? If not I can post it...
thay told me to give them a call and let them know how it works. This was the first time thay have heard of it being used on a boat.Well, THAT is sure good news. No return line, T-Fittings and all that garbage to deal with. Good hearing it straight from Perry. Thanks for giving them a call. B)
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