Description
Sierra 18-5899 Oil Pressure Sending Unit for MerCruiser, Volvo, OMC
Sierra replacement oil pressure sender. Used on most types of marine applications on sterndrive and inboard engines. All Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements.Specifications:
- Sender Code “C”
- Range – 80 psi
- Thread Size – 1/8″ – 27 NPT
- Terminal Type – 10-32 stud
Use with 80 psi electric oil pressure gauge.Replaces:
- Crusader
- 700425
- MerCruiser
- 815425T
- 90806A
- 34623
- 90806
- 815425
- 8M0068784
- OMC
- 172127
- 982650
- 3853800
- 3857532
- Volvo
- 3857532
- Pro Marine
- 65899
- Redline
- 5899
- Datcon
- 02504-00
- Faria
- 90512
- Medallion
- A-2547
- Pleasurecraft
- R02001
- Stewart Warner
- 279-A
- VDO
- 360 801
- Veethree Seastar
- lA15001
- Volvo Penta
- 3857532
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)

![Dometic 25 Insulated Flex R4.2 Ducting/Duct – 4″ [9108549910]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/dometic-25-insulated-flex-r4-2-ducting-duct-4-9108549910.webp)
![Whitecap Teak Lumber – 1/2″ x 1-3/4″ x 72″[60813]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/whitecap-teak-lumber-1-2-x-1-3-4-x-72-60813.webp)
![Scanpod Helm Pod System – White[SPH-SYSTEM-W]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/scanpod-helm-pod-system-white-sph-system-w.webp)
![Blue Sea 1455 4 Position Switch CLB Square[1455]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/blue-sea-1455-4-position-switch-clb-square-1455.webp)
![Ancor Premium Electrical Tape – 3/4″ x 66′ – Orange[334066]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/ancor-premium-electrical-tape-3-4-x-66-orange-334066.webp)