Mercury Marine MCM 3.0L — Changing Oil and Filter
Maintenance · Engine Oil
For the Mercury Marine MCM 3.0L, from the Mercury Marine service manual.
Applies to: General Motors MCM 3.0L / 3.0LX engine
Procedure
- Start engine and run until it reaches normal operating temperature.
- Stop engine.
- Remove drain plug from oil pan or oil drain hose.
- After oil drains completely, reinstall drain plug and tighten securely.
- Remove and discard oil filter and sealing ring.
- Coat sealing ring of new filter with engine oil and install; tighten securely, do not over-tighten.
- Fill crankcase with oil.
- Start engine and check for leaks.
Tools required
- Quicksilver Crankcase Oil Pump Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Crankcase oil with filter: 4 U.S. Qts. (3.8 L)
Source: Mercury Marine service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.