Mercury Marine MCM 3.0L — Priming Engines with Oil
Maintenance · Lubrication System
For the Mercury Marine MCM 3.0L, from the Mercury Marine service manual.
Applies to: General Motors MCM 3.0L / 3.0LX engine
Before you start
- Crank engine for 15 seconds, then allow starter motor to cool for 1 minute
Procedure
- Fill crankcase to proper level with recommended engine oil.
- Remove spark plugs.
- Leave ignition key in OFF position.
- Connect remote starter switch to large 12V terminal (RED battery cable) and small terminal on starter motor.
- Crank engine for 15 seconds, then allow starter motor to cool 1 minute.
- Repeat until a total of 45 seconds of crank time is achieved.
- Remove remote starter switch.
- Install spark plugs and wires.
- With cooling water supplied to seawater pump, start engine.
Tools required
- 91-52024A1 Remote Starter Switch Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.