Mercury Marine MCM 4.3L / MCM 4.3L EFI — Changing Oil and Filter
Maintenance · Crankcase / Oil Filter
For the Mercury Marine MCM 4.3L / MCM 4.3L EFI, from the Mercury Marine service manual.
Before you start
- Change oil when engine is warm from operation
Procedure
- Start engine and run until normal operating temperature.
- Stop engine.
- Remove drain plug from oil pan or oil drain hose.
- After oil has drained completely, reinstall drain plug and tighten securely.
- Remove and discard oil filter and its sealing ring.
- Coat sealing ring of new filter with engine oil and install; do not overtighten.
- Fill crankcase with oil.
- Check dipstick and start engine; check for leaks.
Tools required
- Quicksilver Crankcase Oil Pump (if dipstick access only) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fill to FULL or OP RANGE mark on dipstick
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.