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Mercury 20 User Manual

Mercury 20
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OPERATION
35
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NOTE: Starting flooded engine ‑ push in the primer/idle speed knob and turn full clockwise. Continue to crank
the engine for starting.
11. Turn the primer/idle speed knob counterclockwise to obtain desired idle speed as engine warms up.
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12. Check for a steady stream of water flowing out of the water pump indicator hole.
NOTE: Engines equipped with a thermostat The amount of water flow can vary due to the thermostat operation.
It may take several minutes for the engine to warm up enough for water to start spraying out of the indicator
hole.
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IMPORTANT: If no water is coming out of the water pump indicator hole, stop engine and check cooling water
intake for obstruction. No obstruction may indicate a water pump failure or blockage in the cooling system.
These conditions will cause the engine to overheat. Have the outboard checked by your dealer. Operating the
engine while overheated will cause serious engine damage.
Starting The Engine ‑ Electric Start Remote Control Models
Before starting, read the Pre‑Starting Check List, Special Operating Instructions, and Engine Break‑in Procedure
in the Operation Section.
1. Open fuel tank vent on manual venting type tanks.
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2. Squeeze the fuel line primer bulb several times until it feels firm.

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Mercury 20 Specifications

General IconGeneral
BrandMercury
Model20
CategoryOutboard Motor
LanguageEnglish

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