![GROCO 4 Port Oil Change System w/Reversing Switch - 12V [G-4A 12V]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/groco-4-port-oil-change-system-w-reversing-switch-12v-g-4a-12v.webp)
4 Port Oil Change System with Reversing Switch – 12V
Features:
- Powerful Gear pump Delivers Nearly twice the Flow as Competitive Models
- TouchPad Controlled
- Bronze Manifold System
- System Sizes from 3 Valves to 6 Valves
- Resettable Overcurrent and Dry Run Protection
- Cover Conceals Pump and Circuitry on G Series
- Oil Pan Adaptors Available for all Common Marine engines
![Shurflo by Pentair Oil Change Pump w/3.5 Gallon Bucket - 12 VDC, 1.5 GPM [8050-305-426]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/shurflo-by-pentair-oil-change-pump-w-3-5-gallon-bucket-12-vdc-1-5-gpm-8050-305-4.webp)
![GROCO 4 Port Oil Change System w/Reversing Switch - 24V [G-4A 24V]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/groco-4-port-oil-change-system-w-reversing-switch-24v-g-4a-24v.webp)
![Whale Inline Electric Galley Pump - 13LPM - 12V [GP1392]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/whale-inline-electric-galley-pump-13lpm-12v-gp1392.webp)
![GROCO Commercial Duty Vane Pump - 12V [SPO-80-N 12V]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/groco-commercial-duty-vane-pump-12v-spo-80-n-12v.webp)
![GROCO 3 Port Oil Change System w/Reversing Switch - 24V [G-3A 24V]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/groco-3-port-oil-change-system-w-reversing-switch-24v-g-3a-24v.webp)
![GROCO Commercial Duty Reversing Vane Pump - 24V [SPO-80-R 24V]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/groco-commercial-duty-reversing-vane-pump-24v-spo-80-r-24v.webp)
![Jabsco Drill Pump Kit w/Hose [17215-0000]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/jabsco-drill-pump-kit-w-hose-17215-0000.webp)
![Jabsco Engine Oil Changer Oil Drain Pump [34060-0130]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/jabsco-engine-oil-changer-oil-drain-pump-34060-0130.webp)