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Old 04-30-2019, 12:23 PM
bikerider bikerider is offline
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Default Tapping stock intake manifold for pulse fuel pump?

I have a vertical shaft Briggs 6.5hp (flathead style) engine and am adding a pulse fuel pump. Can I tap the stock intake manifold for vacuum for the pulse fuel pump?
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Old 04-30-2019, 03:04 PM
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IDK for sure, but I think that would ruin your fuel pump eventually due to gas getting where it shouldn't. But IDK.
Vertical shaft? What's the application?
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Old 04-30-2019, 03:54 PM
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Originally Posted by JTSpeedDemon View Post
IDK for sure, but I think that would ruin your fuel pump eventually due to gas getting where it shouldn't. But IDK.
Vertical shaft? What's the application?
Thereís adapters made for letís say the 212 that have a brass nipple between the carb and block exactly for what he wants. Itís common, I donít see why not use it as a vaccume
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Old 04-30-2019, 06:25 PM
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The intake manifold is a good place for the port. I was asking if it is safe to drill the stock intake manifold for a vacuum port. All the engines I've seen with the pulse line run to the intake manifold have aftermarket intakes, not stock.

---------- Post added at 05:25 PM ---------- Previous post was at 04:58 PM ----------

Also, I was searching google trying to find the type of port I would need and didn't come up with much. Can anyone help me out?
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Old 04-30-2019, 07:02 PM
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Vertical shafts arent really what we use around here for gokarts... we use the typical horizontal shafts...

What is the aplication you are using it for?...
Pics??
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Old 04-30-2019, 07:11 PM
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Yes tapping the intake manifold to run a barbed fitting for a pulse pump will work. I'm guessing running just a gravity fed gas tank is not an option? It works on the horizontal shaft flathead engines.
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Old 04-30-2019, 07:28 PM
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Vertical shafts arent really what we use around here for gokarts... we use the typical horizontal shafts...

What is the aplication you are using it for?...
Pics??
My project is a converted outboard boat motor.
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Old 04-30-2019, 07:35 PM
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Yes tapping the intake manifold to run a barbed fitting for a pulse pump will work. I'm guessing running just a gravity fed gas tank is not an option? It works on the horizontal shaft flathead engines.
I wish, but my original gravity fed tank has a crack in it. :/ A few months ago I bought everything to setup a 3 gallon boat fuel tank, pulse fuel pump, and quick connections for my outboard. I hadn't planned on installing the new fuel system this season but fishing has opened and I really can't go on the water with fuel leaking from the built in tank.

---------- Post added at 06:35 PM ---------- Previous post was at 06:34 PM ----------

I found a fitting from go power sports. https://www.gopowersports.com/pulse-inlet-fitting

I am going to buy that and an 11/32 drill bit.
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Old 04-30-2019, 07:47 PM
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Well happy fishing! Hope to do some channel cat fishing this year around the 4th of July. How much of a pain was it to mate the briggs to the outboard?
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Old 04-30-2019, 07:53 PM
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Well happy fishing! Hope to do some channel cat fishing this year around the 4th of July. How much of a pain was it to mate the briggs to the outboard?
Thank you You as well when you head out. Overall the project has been quite enjoyable. It takes a lot of creative problem solving and really researching for the answers but the payoff is rewarding. I think I watched every home made outboard video on youtube several times haha.
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Old 05-01-2019, 05:51 AM
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all of the 4 stroke industrial engines ive dealt with get the fuel pump pulse from the crank case, and not the intake. usually valve cover, or dipstick tube.
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Old 05-01-2019, 10:08 AM
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Originally Posted by Kaptain Krunch View Post
all of the 4 stroke industrial engines ive dealt with get the fuel pump pulse from the crank case, and not the intake. usually valve cover, or dipstick tube.
I wish I had a valve cover to tap into. It would be easier. Would you have to order a new dipstick tube for the second option?
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Old 05-01-2019, 10:48 AM
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Originally Posted by bikerider View Post
I wish I had a valve cover to tap into. It would be easier. Would you have to order a new dipstick tube for the second option?
You still have a valve cover of sorts, i think carb side on that engine. Should have a vent coming out of it connected to the air box. its a rectangular cover allows access to valve springs, keepers, etc.

That being said, i also see no problem with tapping the intake. whatevers easier.
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