

⚡ Start Strong, Stay Reliable – Power Your Ride with Confidence!
The 300A Continuous Duty Solenoid Relay by MaySpare is a robust 12V DC starter solenoid designed for heavy-duty applications like golf carts, winches, and marine equipment. Featuring a 14Ω coil resistance, 10.2W power rating, and nickel-plated copper contacts, it delivers up to 300A transient current with continuous operation recommended under 100A. Its corrosion-resistant design and precise 2-hole bracket mounting ensure durability and easy installation, making it a top choice for reliable engine starts.











| ASIN | B072MZHK48 |
| Best Sellers Rank | #6,527 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Starter Solenoids |
| Brand | MaySpare |
| Brand Name | MaySpare |
| Coil Resistance | 14 Ohms |
| Coil Voltage | 12 Volts |
| Connector Type | Screw |
| Contact Current Rating | 300 Amps |
| Contact Material | Copper |
| Contact Type | Normally Open |
| Current Rating | 300 Amps |
| Customer Reviews | 4.3 out of 5 stars 2,795 Reviews |
| Manufacturer | MaySpare |
| Minimum Switching Voltage | 12 Volts (DC) |
| Mounting Type | 2 hole mount flange |
| Operation Mode | Automatic |
| Specification Met | Mayspare Quality Standard |
| Wattage | 10.2 watts |
M**1
Working great on my Exmark.
Installed this on an Exmark with a Briggs & Stratton engine. Working great but the mounting holes in the feet seem too close under the bigger cables. It was a bit tight to tighten the nuts.
J**Y
Good relay for cheap
Nice relay for snow plow and cheap. Is holding up nice for about 25 driveways now.
K**N
Stupid dues paid for this replacement
Bought this replacement for a perfectly good one that I had on my JCB for years, one that I ruined by being stupid. The new one is a heavy duty one 200amp that is exact replacement that got here super quick. If it works like the one I stupidwrecked I will be most happy.
M**K
ground the other small wire
worked as it should,the two small wires one is what i call the trigger wire and the other Must be grounded.
L**T
Great Service
Great Product & Great Service
C**R
Short use and fear of fire
I purchased this product because I needed a continuous duty solenoid to keep two 12v batteries wired in parallel charged while driving the vehicle but not engaged while the engine is off, so my engine battery would not lose its charge because of the two house batteries draining it without my knowledge. It took some time to install the system and get my Chevy cargo van ready for some distance camping. But even before I left town, I discovered that the solenoid was getting hotter than I could even touch and my automatic breaker kept cycling. The odd thing was that I didn't have my inverter turned on nor any of my inside lighting (which wouldn't have been much). The only thing that was going on was the solenoid providing power from the alternator to keep the two house batteries charged. Nothing on the device indicates it's a continuous duty device and nothing on the device indicates the rated amperage. I'm quite disappointed that the device I purchased didn't even last for a single camping trip but gave me enough unrest, over perhaps suddenly bursting into flames, that I disconnected the device. And since I purchased the device June of 2019 and it's now August of 2020, I can't even return it for a refund. So, it's a total bust and I would caution other buyers to be aware and make certain you thoroughly check it out before getting into a desolate area and finding that it's just not what it should be.
J**O
Selenoid
When install this solenoid i was shock it performed so well/ recomend
P**W
Good deal
As described
Trustpilot
2 weeks ago
2 weeks ago