Need to replace mins. Whats the best route to go?
Original mechanical pump or 24v electric?
Fuel pump
Moderators: Cal_Gary, T. Highway, Monkey Man, robi
- Hal O'Peridol
- PFC
- Posts: 63
- Joined: Sun Jun 30, 2013 8:47 pm
- Location: Northwest Wa State
Fuel pump
USAR 1980-1983
US Army 1983 to 1993 05H20Y4, 98G2LGM
Desert Storm 1990 to 1991, 1st Inf Div.
1984 M1009 CUCV
1944 GPW 1/4 T
1953 M37 3/4 T
M100 1/4T trailer
1 M416 1/4T trailer
More Army Surplus stuff than you can shake a stick at.
US Army 1983 to 1993 05H20Y4, 98G2LGM
Desert Storm 1990 to 1991, 1st Inf Div.
1984 M1009 CUCV
1944 GPW 1/4 T
1953 M37 3/4 T
M100 1/4T trailer
1 M416 1/4T trailer
More Army Surplus stuff than you can shake a stick at.
Re: Fuel pump
Lots to be said for the mechanical pump. Some run them without any issues.
I went with electric as the mounting can be close to the tank and a better filter used. Putting an electric pump in has a few more steps, than just slapping one on, to be safe.
The mechanical has a couple of bad issues:
Susceptible to Vapor lock being near the heat source.
Diaphragms cracking leading to gas in the oil (bad).
I went with electric as the mounting can be close to the tank and a better filter used. Putting an electric pump in has a few more steps, than just slapping one on, to be safe.
The mechanical has a couple of bad issues:
Susceptible to Vapor lock being near the heat source.
Diaphragms cracking leading to gas in the oil (bad).
1952 M37 - Mods = Locking hubs, battery switch, 2 bank charger, PB, PS, Pertronix SSI, Elect fuel pump w/filter&pressure switch.
Planned: Seatbelts, Bimini top![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
Planned: Seatbelts, Bimini top
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
Re: Fuel pump
I went with electric and eliminated the mechanical pump when I had a freshly rebuilt 251 installed in my M37.
If the mechanical pump starts having issues, you risk ruining your engine if you don't catch it before it fills your crankcase with gas. You are stuck, need a tow home, and are down until you repair or replace the engine.
When the electric pump fails, you may be stuck by the side of the road and need a tow home, but the repair is simple. In a pinch, you can rig a gas can on the fender and gravity feed the carb to get yourself going again.
With the right electric fuel pump, there is no need for a separate pressure regulator. I used this Facet 24V Pump rated at 4-5 PSI mounted on the frame back near the fuel tank. I've got over 7000 miles on it with no problems so far.
If the mechanical pump starts having issues, you risk ruining your engine if you don't catch it before it fills your crankcase with gas. You are stuck, need a tow home, and are down until you repair or replace the engine.
When the electric pump fails, you may be stuck by the side of the road and need a tow home, but the repair is simple. In a pinch, you can rig a gas can on the fender and gravity feed the carb to get yourself going again.
With the right electric fuel pump, there is no need for a separate pressure regulator. I used this Facet 24V Pump rated at 4-5 PSI mounted on the frame back near the fuel tank. I've got over 7000 miles on it with no problems so far.
1951 M37 "Brutus" w/Winch and 251 engine
Re: Fuel pump
Same for me. Although I still have the mechanical for the vacuum. I'll take it off in the future if I put on electric wipers.John Mc wrote: ↑Fri Mar 08, 2024 9:57 am With the right electric fuel pump, there is no need for a separate pressure regulator. I used this Facet 24V Pump rated at 4-5 PSI mounted on the frame back near the fuel tank.
1952 M37 - Mods = Locking hubs, battery switch, 2 bank charger, PB, PS, Pertronix SSI, Elect fuel pump w/filter&pressure switch.
Planned: Seatbelts, Bimini top![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
Planned: Seatbelts, Bimini top
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
- HingsingM37
- 1SG
- Posts: 1453
- Joined: Sat Oct 20, 2007 3:43 am
- Location: North Carolina
Re: Fuel pump
In my 19 year adventure with My M37 I have only been stranded twice. Each time it was a mechanical fuel pump issue. With the OEM pump the lever pin backed out. Then I put a civvy PW pump on. That lever came apart. Two years ago I installed a Carter 24VDC marine grade pump with a spin on fuel filter at the tank and it has been great. Oil pressure activated. A little buzzing noise but glad I did it. I put electric wipers on years back so no need for vacuum.
I also finally installed seatbelts last month. Now that I am 60 that big steering wheel and plate glass looks menacing if there was an incident![Wink :wink:](./images/smilies/icon_wink.gif)
I also finally installed seatbelts last month. Now that I am 60 that big steering wheel and plate glass looks menacing if there was an incident
![Wink :wink:](./images/smilies/icon_wink.gif)
David
HingsingM37
1958 M37B1
1968 M101A1 Trailer
MVPA# 33078
"Do Not Take Counsel of Your Fears"
General George S. Patton Jr.
"Those who pound their guns into plows, will plow for those who do not".
HingsingM37
1958 M37B1
1968 M101A1 Trailer
MVPA# 33078
"Do Not Take Counsel of Your Fears"
General George S. Patton Jr.
"Those who pound their guns into plows, will plow for those who do not".
Re: Fuel pump
My truck was already converted to 12V and on an electric pump, so I stayed electric and replaced the existing once since I had no idea how many miles were on it.
Gary
Gary
Cal_Gary
1954 M37 W/W
MVPA Correspondent #28500
1954 M37 W/W
MVPA Correspondent #28500
- Hal O'Peridol
- PFC
- Posts: 63
- Joined: Sun Jun 30, 2013 8:47 pm
- Location: Northwest Wa State
Re: Fuel pump
Thanks to all who replied
USAR 1980-1983
US Army 1983 to 1993 05H20Y4, 98G2LGM
Desert Storm 1990 to 1991, 1st Inf Div.
1984 M1009 CUCV
1944 GPW 1/4 T
1953 M37 3/4 T
M100 1/4T trailer
1 M416 1/4T trailer
More Army Surplus stuff than you can shake a stick at.
US Army 1983 to 1993 05H20Y4, 98G2LGM
Desert Storm 1990 to 1991, 1st Inf Div.
1984 M1009 CUCV
1944 GPW 1/4 T
1953 M37 3/4 T
M100 1/4T trailer
1 M416 1/4T trailer
More Army Surplus stuff than you can shake a stick at.