Pulse type fuel pump added onto Briggs engine?

[Arkie]

Or you could tie a big block of wood on the key to remind you....

Already got a big block of wood hanging between my ears, probably would not notice another.

The carb (carbs) are operating normally now, but have been know too leak fuel when subjected to periods of standby or long term storage. Also trying to be independent of 12v or solenoid voltage. Want to start by manual crank if necessary.

What if the fuel line was elevated above the gravity fed fuel tank before it arrived at a pulse type fuel pump so as to prevent siphon feed thru the system????

[bgsengine]

What if the fuel line was elevated above the gravity fed fuel tank before it arrived at a pulse type fuel pump so as to prevent siphon feed thru the system????

Won't do a thing. You could run that line a mile (not literally) above the fuel tank level, but if the bottom outlet of the fuel line is below the level of fuel in the tank, it'll still siphon out

[Arkie]

Guess it will be manual shutoff and if gas gets in the oil, blame it on the wife, again!

[bobodu]

Won't do a thing. You could run that line a mile (not literally) above the fuel tank level, but if the bottom outlet of the fuel line is below the level of fuel in the tank, it'll still siphon out

You sure about that? Seems to me the only part that would siphon off would be from the apex down to the open end and the side closest to the tank would go to that level.

[Mek-a-nik]

Arkie, I yam confused here! Why don't you just fix the carb(s)?

[Arkie]

Arkie, I yam confused here! Why don't you just fix the carb(s)?

Not anything wrong with the carbs. I've had issues with carbs that operated ok as long as the eq was being operated but the needle and seat would seep enough to add gas to the oil during standby and the engines get ruined. (carbs would be repaired after the engine was ruined) Other people besides myself operate the equipment and they just crank er up and go. If they look at the oil level on the dipstick and it's a little high or over full on the dip stick they think it's A ok and don't register that it's gasoline thinned. I have two gravity fed Briggs engines (a 10 hp and a 15 hp twin) that have been ruined by gas in oil. One of the engines was running great and the gas got past the needle and seat and the anti-backfire solenoid seat) Repaired the carb and added a fuel petcock
AFTER the engine was ruined. Kinda like using birth control afterwards. I have some eq that have the gas tanks below the carb and use the pulse type fuel pumps mounted on the front of the carb and never have had the gas in oil issue.

I was also thinking like you that if the fuel line were routed above the level of the gravity fed fuel tank before it got to a pulse pump that the only gas that would start a siphon seep thru would be just the amount in the gas line that is below the tank and would not start a siphon of the lower level gas in the tank and the add on pulse pump would (suck) pump the fuel during hand crank and when operating The amount of gas going into the fuel is like a 1/2 cup over week or longer time during storage or standby. (gasoline seep thru during storage or standby not really noticeable on the dipstick to the untrained eye and just enough to thin out the oil and start ruining the engine during the next operation because the operator failed to turn off the manual petcock during storage)

[KE4AVB]

Arkie,

Have you tried using a good fuel filter in the fuel lines? These leaks might be very small pieces of trash getting wedged between the needle and seat so doesn't clear because the float valve never opens enough during these non-use times.

[Arkie]

Arkie,

Have you tried using a good fuel filter in the fuel lines? These leaks might be very small pieces of trash getting wedged between the needle and seat so doesn't clear because the float valve never opens enough during these non-use times.

Yes, red filter for gravity (approx. 150 microns) and white (approx. 50 microns) for the pump type systems.

[bgsengine]

Won't do a thing. You could run that line a mile (not literally) above the fuel tank level, but if the bottom outlet of the fuel line is below the level of fuel in the tank, it'll still siphon out

You sure about that? Seems to me the only part that would siphon off would be from the apex down to the open end and the side closest to the tank would go to that level.

ever try siphoning out a 55 gallon drum?

as long as air is not flowing back up the hose/pipe to displace fuel it'll drain to the level of the end of the hose. its a trick of atmospheric pressure working on the surface area of the tank (wider surface area) against the atmospheric pressure working against the surface area of the hose outlet. ... Think on it a bit.

[KE4AVB]

You can try tightening the filtering level then. I got a Bolens (personal mower) that I had nothing but carburetor problems on when I first inherited from the roadside. I now been using a 70 µm fuel filter on it for the last two years without problems. This engine uses a gravity fed carburetor.

The 150 µm filter lets anything under .00585" through and the 70 µm only let anything that are less than .̶2̶7̶3̶"̶ (corrected figure to .00273"; I didn't type the leading zeros) through.

Just a thought doesn't mean it fix the problem that happens during storage.