





⚡ Power your diesel with precision and reliability – don’t get left idling!
The MaySpare Fuel Shut Off Solenoid (model US-3935649) is a robust 12V continuous duty solenoid designed for 5.9L and 8.3L Cummins diesel engines, Dodge RAM, Ford Freightliner, and marine applications. Featuring a heat-resistant 180℃ copper coil, precision 3-inch mounting bolt spacing, and multiple glued seals to prevent oil leaks, it delivers strong pull performance and reliable fuel shutoff for heavy-duty diesel engines.



| Manufacturer | May Spare Parts |
| Brand | MaySpare |
| Model | Cummins with P7100 pump. |
| Item Weight | 2.53 pounds |
| Package Dimensions | 9.45 x 3.7 x 2.44 inches |
| Item model number | US-3935649 |
| Is Discontinued By Manufacturer | No |
| Exterior | Metallic Finish |
| Manufacturer Part Number | US-3935649 |
| OEM Part Number | 3934972, 3934171,SA-4765-12, SA476512, SA4764, FS-30,2UO130764 ,2U0130764, BG2X9N392AA, SA494124, SA-4335-12, FS30E-12 ,SA-4941-12 |
| Voltage | 12 Volts |
H**R
this literally cost a 10th of getting matched part from Dodge dealer
We had to disassemble the wiring plug, and reuse the original from the old part, in order to get it to plug into the truck wiring harness, but for a few hundred bucks less than getting it from Dodge, that is O.K. It's been a couple of weeks, and so far it's working fine. Great value for the money.
L**E
Does not fit p7100
Absolutely does not fit on a p7100 pump. Binds up and does not operate as it should. Caused me plenty of headache and had to buy another. Do not recommend.
M**E
You can make it work
The plug was to small no fault of yours my husband cut the old wire off and changed the plug and it worked great
R**T
Worked great
Everything as advertised...thanks!
M**.
Arrived on time and exactly what was needed!
This product was exactly what my brother wanted/needed to fix his truck. And it came in on time as described.
A**R
Bad selenoid
Horrible product. Did not work properly. Turns truck on but will not stop. Adjusted it and still no go. Seems like these electronics from China are have no quality control.
J**D
Does not fit truck motors DO NOT BUY FOR TRUCK
Solenoid does not fit vehicle which company advertises it to fit
K**L
Cheaper fix.
Worked for what we needed it for.
Trustpilot
1 month ago
1 week ago