Sterndrive · Engines
MerCruiser 6.2L V8 300 HP service and maintenance
The Mercury maintenance schedule, the steps and parts of every procedure, exploded catalog drawings, official Mercury videos and the owner's manual. Source: Mercury operation and maintenance manual 8M0128973 (©2017), pp. 44–46 and 36–39 and 47–98.
Showroom page: price, specifications, documents →
Step narratives, plan names and glossary definitions come from the Merkür Deniz workshop records and are in Turkish for now; intervals, step counts, parts lists, prices and capacities read the same in any language.
- Power
- 350 HP
- Engine oil
- 4.7 L
- Gearcase
- 1.9 L / 2.7 L / 3.2 L / 3 L / 2.7 L
Maintenance schedule
7 procedures by engine hours and calendar
1-month service
5 steps · 0 parts
Steps and parts →warranty condition20hoursFirst service
3 steps · 2 parts · 1 h
Steps and parts →50hours50-hour service
1 step · 1 part · 1 h
Steps and parts →100hours / yearAnnual service
12 steps (5 dealer) · 6 parts · 1 h
Steps and parts →300hours / 3 yearsMajor service
12 steps (9 dealer) · 9 parts · 1 h
Steps and parts →500hours / 5 years500-hour service
1 step (1 dealer) · 1 part · 1 h
Steps and parts →SeasonendWinterization and storage
7 steps · 6 parts · 1 h
Steps and parts →Interval rule: hours or calendar, whichever comes first. In salt water, anodes, spark plugs and lubrication points are checked more often.
Every trip
Checks the boat owner does
Pre-use check · 5 checks
Before every trip, a few minutes. Done with the engine off.
- Motor yağı seviyesi
- Hidrolik direksiyon yağ seviyesi
- Power trim pompası yağ seviyesi
- Kuyruk dişli yağı seviyesi (monitör)
- Lanyard stop kontrolü
After-use care · 1 check
After every trip; always after salt, dirty or muddy water.
- Soğutma sistemi flush (tuzlu/acı su)
Capacities and oils
Values specific to this model
| System | Capacity | Oil / spec | Mercury product |
|---|---|---|---|
| Coolant · Kapalı soğutma | 17 L | Extended Life Coolant | 92 8M0117687 (4 L) |
| Engine oil (with filter) | 4.7 L | 25W-40 Synthetic Blend | 92 8M0206956 (4 L)92 8M0206955 (1 L) |
| Gearcase (lower unit) oil · Kuyruk: Alpha One | 1.9 L | HP Gear Lube SAE90 | 92 858064QB1 (1 L) |
| Gearcase (lower unit) oil · Kuyruk: Bravo One | 2.7 L | HP Gear Lube SAE90 | 92 858064QB1 (1 L) |
| Gearcase (lower unit) oil · Kuyruk: Bravo Two | 3.2 L | HP Gear Lube SAE90 | 92 858064QB1 (1 L) |
| Gearcase (lower unit) oil · Kuyruk: Bravo Three (tek) | 3 L | HP Gear Lube SAE90 | 92 858064QB1 (1 L) |
| Gearcase (lower unit) oil · Kuyruk: Bravo Three (çift) | 2.7 L | HP Gear Lube SAE90 | 92 858064QB1 (1 L) |
Source: 8M0128973 and the accessory catalog quick-reference table; confirmed by the Merkür Deniz service team.
This page is information compiled from the Mercury manual; steps marked as dealer work require Mercury dealer training and tools. During the warranty period, maintenance must be recorded at an authorized dealer.