Electric Fuel pump used on Briggs engines

[Gordon McAndrew]

I have a low pressure (4 to 7 psi) electric fuel pump from an auto store on
my fuel system. It appears that the pump is too high a pressure. I have a 6
and an 18 hp Briggs and both have overflow problems.

I stopped the 6 from spilling gas but I don't know if it is really solved
because the 18 is still spilling even after opening the float bowl and
tweaking the float level. The valves appear to be working right with nothing
to make them stick open but it is still a problem.

What is the pressure range that should be used and what pump is it that I need
to do that?

Gordon McAndrew

[SEVTEC]

>Subject: Electric Fuel pump used on Briggs engines
>From: gor...@arc.ab.ca (Gordon McAndrew)
>Date: 9/6/2001 5:57 PM Pacific Daylight Time
>Message-id: <3b981b51....@news.ab.tac.net>

6" of gravity feed to 1 1/2 psi. This is a standard problem, as the pressure
merely overwhelms the float valve. Some people us a regulator on these pumps,
but one I have heard of moves if you hit a bump, r expose to vibration, so you
might have to tie the dial of the device down. The existing pump is good to
18" lift, but I have had it reported that if you tighten up the hose seals,
including the pressure pulse hose, you can get more lift.

Although the problem was so rare in the Vanguard prototype that it was not
addressed, some builders have found that the last 3 inches of fuel will not
lift. The tank can be raised to avoid this. Make sure the tank is tied down
and the vent is open, as some tank manufacturers have used the clever
incredible automatic closing vent valve on their tanks, mainly Tempo. I just
put a piece of wire through the vent and do not fill the tank full.

Barry Palmer, for <A
HREF="http://members.aol.com/sevtec/sev/skmr.html">Sevtec</A>

[Carol Alm]

Gordon,

There is a lower pressure electric fuel pump available. JC Whitney
has one that is 1-1/2 - 3-1/2 psi. They also have another one that
is adjustable from 1-3/4 - 5 psi, it has a built in regulator.

They are online if you care to look at them.

Dennis Alm

[Msonger4]

Gordon,

They make fuel pumps for these engines that work off of a vacuum from the
engine. All you do is drill a hole and tap it for the fitting, hook up the
vacuum line, and connect the fuel lines to the tank and to the carb and it
works very well. I just installed my 2nd fuel pump on my lift engine on my
racer this past weekend. I have never had problems with them. The pump that I
bought was a Briggs & Stratton part and it was like $13.00. I got it from a
local lawn mower repair shop.

Marquis Songer
Universal Hovercraft
www.hovercraft.com
5801 W. Hill Street
McHenry, IL 60050

[hfly]

There's a good chance that you now have gas in your engine oil. This
is called oil dilution and a good way to tell is by looking at your
air filter. If it is wet or oily you have it and you need to change
the oil, oil filter (if it has one), and air filter after you have
corrected the fuel pump problem. Also it's important to use a fuel
shut-off because gas will expand when warm and force itself through
the carb float and dilute the engine oil. Another way is to disconnect
the fuel tank and run the engine until it's out the gas after each
use.

mson...@aol.com (Msonger4) wrote in message news:<20010906224827...@mb-cr.aol.com>...

[Robert Ball]

Is there any problem with the carb gaskets drying out and cracking, or is there a technique to avoid
that problem, if it exists?

[Bob Zang]

To easily solve this problem, I suggest Marquis's way. Buy the pump for
less than $20 and be done with it in less than 20 minutes!

--
Robert J. Zang
Universal Hovercraft
www.hovercraft.com

Gordon McAndrew <gor...@arc.ab.ca> wrote in message
news:3b981b51....@news.ab.tac.net...

[Gordon McAndrew]

I hunted for a long time yesterday for a pump that was in the 2 to 3 psi
range. Finally found one but when I go to order it then it is not available
but the store could get one of a different make with the same specs. They
never heard of one that low earlier in the day. But the price is $80. Were
oh were could I buy one for under $20? I had to pay for the $80 pump already
but I would need the information for my next hovercraft:-)

Gordon McAndrew

"Bob Zang" <hover...@hovercraft.com> wrote:

;>To easily solve this problem, I suggest Marquis's way. Buy the pump for

;>

Gordon McAndrew

[Marquis Songer]

The pump I bought was a Briggs & Stratton part and was only like $13. Bob: If
you look on Bill's bench in the shop there are two of those pumps. Could you
find the part number on the box and publish it for everyone else to see.

Marquis Songer
Universal Hovercraft
www.hovercraft.com
5801 W. Hill Street
McHenry, IL 60050

(815) 344-0505

[Gordon McAndrew]

Oh, you are talking about a pulse pump on the engine. My lift engine is
mounted too high to make use of that. I needed an electric fuel pump to
supply both engines.

mson...@aol.comnojunk (Marquis Songer) wrote:

;>The pump I bought was a Briggs & Stratton part and was only like $13. Bob: If

Gordon McAndrew

[Bob Zang]

Marquis,
Briggs & Stratton Part # 692026
$13.95
Smith's Small Engine
Terre Haute
(812)232-1318

--
Robert J. Zang
Universal Hovercraft
www.hovercraft.com

Marquis Songer <mson...@aol.comnojunk> wrote in message
news:20010911223828...@mb-da.aol.com...

[dajo...@hotmail.com]

easy enough to use the 7 lb electric pump. just put in a fuel
pressure regulator. 15-20 bucks at your local auto parts store. i do
it all the time on Onans at work. Onan wants 7.6 billion dollars for
a fuel pump (or there abouts) so i put on a cheap pump and adjustable
regulator. NAPA (national awful parts association) carries it for
about 20 locally but DAP, Autozone, etc. are about 15. Puralator
PR53, PR54 i believe. Adjustable from 1/2 lb to 6 or 7 i think. good
luck, doug
>

[Gordon McAndrew]

I tried to find that also. The stores here and in Edmonton "never heard of
and adjustable fuel pressure regulator". Thanks for the part numbers, it will
make it easier next time.

dajo...@hotmail.com wrote:

;>easy enough to use the 7 lb electric pump. just put in a fuel

;>>
;>

Gordon McAndrew

[Gordon McAndrew]

Well I finally have some success with the engines to report.

I had a problem with too much fuel pressure because of some bad advice from
a company in Edmonton. I got some good pointers from someone in this group
and got a 2 to 3 psi fuel pump instead of the 4 to 7 psi one they sold me. I
picked it up yesterday and installed it today. No fuel problems today. I got
the lift engine started and running at 3:30 p.m. today and 15 mins later
decided to try the thrust engine. Well I got it running but it was running
way too rich. I tweeked the float level quite a bit lower and tried again.
Same thing! I took the aircleaner off and tried again. Well, now it runs
like a top but I can't put the aircleaner on or it runs poorly and belches
black smoke.

Sure throws a lot of air around, I walked behind the craft with the thrust
engine running at a high throttle setting and had to brace myself or I would
have been blown over.

I do have a question about the running rich problem. Should I lower the
float in the carb bowl by tweeking the arm in there again or do I just have
the wrong main jet?

gor...@arc.ab.ca (Gordon McAndrew) wrote:

;> I have a low pressure (4 to 7 psi) electric fuel pump from an auto store on

Gordon McAndrew

[Robert Ball]

Sounds like the air filter is clogged or got wet, or is way too small for the air
flow the engine needs. Low capacity would show more at higher speeds, less at idle.

[Gordon McAndrew]

Thanks for all the suggestions.

I looked like the air filter got wet with oil.

When I ran the engine and replaced and removed the air filter I noticed that
there was considerable suction holding the filter to the frame. I bought a
new filter this afternoon and I could not feel any suction replacing and
removing this new one and the engine run fine with and without the new filter.

It looks like the filter that was on it was fully saturated with oil. I could
not see any parts that were different, looking at the sun through it, but it
smells of oil and leaves oil traces on the housing every time the engine was
run with it installed.

Now on to finishing the corners of the skirt.

Robert Ball <rwba...@home.com> wrote:

;>Sounds like the air filter is clogged or got wet, or is way too small for the air

[www.hovercrafters.com]

I think air filters on these types of engine are supposed to be wetted out
with oil. I am pretty sure thats what the instructions said to do when I
change the air filter on my 5hp lawn mower engine....

"Gordon McAndrew" <gor...@arc.ab.ca> wrote in message

news:3ba3cca1....@news.ab.tac.net...

[Gordon McAndrew]

The manual shows that there are two air cleaners, one is the dry air cleaner
cartridge and the other is the pre-cleaner. The pre-cleaner is a foam ring
that is wetted with oil but you are supposed to "squeeze in clean, absorbent
cloth to remove all EXCESS oil" (emphasis is theirs) The cartridge is
supposed to be dry and you clean it by tapping it on a flat surface. The
other engine has a foam air filter and I suspect you are right for it.

Gordon McAndrew

"www.hovercrafters.com" <def...@hovercrafters.com> wrote:

;>I think air filters on these types of engine are supposed to be wetted out

;>
;>

Gordon McAndrew

[americans...@gmail.com]