Description
Mercury – Mercruiser 21-857005A-1 Outboard Fuel PumpDiaphramKit
12-piece diaphragm repair kit designed for select 30–65hp Mercury and Mariner 2-stroke outboards. Ideal for restoring carburetor function and fuel delivery efficiency.Fits:
- 30 JET
- 35 hp (Serial No. B110789 & UP)
- 40 hp (4 Cylinder) (Serial No. C159200 & UP)
- 45 hp (4 Cylinder) (Serial No. B110789 & UP)
- 45 JET (Serial No. 6428681 & UP)
- 50 hp (3 Cylinder) (Serial No. B122930 & UP)
- 50/55 hp (3 Cylinder) (Serial No. D000750 & UP)
- 60 (3 Cylinder) (Serial No. B122930 & UP, D000750 & UP)
- 65 JET (Serial No. 283222 & UP)
- 75 (4 Cylinder) (Serial No. 6432901-C099999)
- 75 (3 Cylinder) (Serial No. C222000 & UP)
- 80 JET (Serial No. 0D283222 & UP)
- 90 (6 Cylinder) (Serial No. 6436123-B1100053)
- 100 (4 Cylinder) (Serial No. B209468 & UP)
- 105 JET
- 115 (6 Cylinder) (Serial No. 6436123-B209467)
- 115 (4 Cylinder) (Serial No. B209468 & UP)
- 125 (4 Cylinder) (Serial No. D283222 & UP)
- V-135 (Serial No. A904646 & UP)
- 140 JET
- 150 EFI (Serial No. G303046 & UP)
- V-150 (Serial No. A904646 & UP)
- 175 EFI (Serial No. G303046-G589999)
- V-175 (Serial No. 6618751 & UP)
- 200 EFI (Serial No. G303046-G589999)
- V-200 (Serial No. 6625221 & UP)
- V-225 (Serial No. B117316 & UP)
- V-250/275 (Serial No. C101891 & UP)
- Magnum II (All)
Replaces:
- GLM40290
- Pro Marine1812
- RedlineRL7817
- Sierra18-7817,18-7818-1
California Residents: WARNINGCancer and Reproductive Harm – P65Warnings.ca.gov


![SmartPlug 50 Amp 50 Dual Configuration Cordset w/Marina Park Power End [C50504]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/smartplug-50-amp-50-dual-configuration-cordset-w-marina-park-power-end-c50504.webp)
![Xantrex C-Series Solar Charge Controller – 40 Amps [C40]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/xantrex-c-series-solar-charge-controller-40-amps-c40.webp)
![Sudbury Elastomeric Marine Sealant – 10oz Cartridge – White [300]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/sudbury-elastomeric-marine-sealant-10oz-cartridge-white-300.webp)
![Ocean Signal RescueME EDF1 Electronic Distress Flare – 7 Mile Range[750S-01710]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/ocean-signal-rescueme-edf1-electronic-distress-flare-7-mile-range-750s-01710.webp)
![Whitecap C.P. Brass Sillcock 1-5/8″ Base 3-3/16 Depth[P-2452C]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/whitecap-c-p-brass-sillcock-1-5-8-base-3-3-16-depth-p-2452c.webp)
![GROCO 1-1/4″ Bronze Electric Flanged Seacock – 12V [FBVE-1250 12V]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/groco-1-1-4-bronze-electric-flanged-seacock-12v-fbve-1250-12v.webp)
![Blue Sea 7542 C-Series Flat Rocker Circuit Breaker – Single Pole – 15A [7542]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/blue-sea-7542-c-series-flat-rocker-circuit-breaker-single-pole-15a-7542.webp)
![Jabsco HotShot HD4 Heavy Duty Washdown Pump – 24V – 4 GPM – 60 PSI [Q402J-118N-3A]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/jabsco-hotshot-hd4-heavy-duty-washdown-pump-24v-4-gpm-60-psi-q402j-118n-3a.webp)