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Post by pinkscoot on Oct 15, 2017 13:30:44 GMT -5
I have two scoots that have vacuum fuel pumps. One is dead and the other is suspect. Do any of you have experience with replacing them with an electric pump and which did you use?
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Post by RollingThunder on Oct 15, 2017 14:22:00 GMT -5
While I have no experience with doing this on a scooter, many carbureted UTVs use electric fuel pumps. Here's an example that would probably work on a scooter. |
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Post by lostforawhile on Oct 15, 2017 16:09:47 GMT -5
www.autoperformanceengineering.com/html/fr_pumps.html probably something similar to the FR series, also many of the craftsman higher horsepower lawnmowers which are carburated have a vacuum powered pump, which is more then capable of powering these scooters, and they are cheap
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Post by pinkscoot on Oct 16, 2017 10:20:38 GMT -5
Those might be too high pressure. On the Aprilia site they say stay with 1-2psi. I did look at the Mr. Gasket 42s that seems to fit the bill but the have some bad reviews.
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Post by RollingThunder on Oct 18, 2017 19:56:42 GMT -5
The one I linked doesn't go that low, but this one from Napa does. There's also other ones on ebay that do too, but with such a low pressure requirement, it probably would be a good idea to find one that's regulated or add a regulator. What carbs do these scooters have? |
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Post by pinkscoot on Oct 19, 2017 14:24:17 GMT -5
Rolling Thunder that looks like it will do the trick. I have heard the Facets are more reliable than the Mr Gasket pumps. They are both Keihin carbs. I opened the carb on the 250 yesterday and found the needle jet all covered in rust. Neat trick for a brass fitting. I'll dig in more on Saturday and see if its salvageable.
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Post by 190mech on Oct 20, 2017 18:48:02 GMT -5
Vacuum pumps are reliable and use no electricity,,just case pressure pulses,,Mikuni makes top of the line vac pumps,but a Honda or Briggs&Stratton will likely do just as well...  |
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Post by pinkscoot on Oct 20, 2017 20:22:53 GMT -5
I'm starting to think I'll stay with the vacuum on the BV250 but the Beo will definitely get electric. The vacuum pump with a pulsar and a vacuum petcock is just to much to go wrong.
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Post by 2stroked on Jun 14, 2018 12:59:27 GMT -5
I know this thread is old as dirt, but I have some wisdom to share here.
The 86 Honda Helix CN-250 can be found with a vacuum pump OR an electric fuel pump both version run the same carb and jet sets.
The electric pump will work with any size motor, and pressure isn't an issue. These pumps do not run full time, but rather they "bump" in time with the ignition spark. The pump is fed through the pick up coil, and acts just like a vacuum pump. Only difference is, with an electric pump you can wire a button to fill the fuel bowl before trying to start the scooter if its been sitting a while.
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Post by pinkscoot on Jun 14, 2018 14:11:15 GMT -5
Thanks for the reply 2stroked. I did try the electric pump on the Scarabeo and pulled when I was having electric problems. The one I used was a basic 12 volt fuel pump, no problems except the electric gremlin I'm still chasing. When I have that sorted it may go back on. I could go with gravity feed on the scoot except that I would run out of fuel at a 1/4 tank.
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Post by 2stroked on Jun 14, 2018 21:55:42 GMT -5
I get that. I just thought that Hondas implementation of the spark controlled pump was kinda cool. It negated the need to pressure regulate the lines or pump, and assures the carb won't be over pressurized, all without e,tea added computer modules or relays.
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Post by pinkscoot on Jun 15, 2018 13:29:05 GMT -5
That would be the way to go. The more fuel you need the more you get.
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Post by 2stroked on Jun 15, 2018 17:34:54 GMT -5
Yup. RPM dependant fuel flow. Just like a vacuum pump, but without the extra chances of air leaks, or diaphragm failure. And, if you're like me and do t get to ride everyday, it can be modded to hold a primer function. Push a button for a few seconds, then start the bike. What a difference!
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Post by jmkjr72 on Jun 15, 2018 18:50:53 GMT -5
Ok the big issue here s going to be does the scoot make enough juice to run an ele fuel pump
Easy way to get an idea
Turn your key on but don’t start the scooter if the headlight is on you have a full dc set up and might have enough ju Cue to run the fuel pump
If you have to have the scooter running for the headlight to be on no you don’t make enough juice to run an ele fuel pump
I’ve done efi conversions and the lack of juice is the biggest issue
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Post by pinkscoot on Jun 15, 2018 19:38:34 GMT -5
My headlight is on with the key on. I also had a bad battery and a sketchy Briggs & Stratton starter relay. next week I'll have time to get back to it and see if the new battery and relay solve my problems.
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