Mercury 45 Operator's Manual

OPERATION
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3. Make sure the cooling water intake is submerged.
!
CAUTION
Never start or operate your outboard (even momentarily) without water circulating through all the cooling water
intake holes in the gearcase to prevent damage to the water pump (running dry) or overheating of the engine.
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Engine Break‑in Procedure
!
CAUTION
Severe damage to the engine can result by not complying with the Engine Break‑in Procedure.
1. For the first hour of operation, run the engine at varied throttle settings up to 3500 RPM or at approximately
half throttle.
2. For the second hour of operation, run the engine at varied throttle settings up to 4500 RPM or at
three‑quarter throttle, and during this period of time, run it at full throttle for approximately one minute every
ten minutes.
3. For the next eight hours of operation, avoid continuous operation at full throttle for more than five minutes
at a time.
Starting The Engine ‑ Remote Control Models
Before starting, read the Pre‑Starting Check List, Special Operating Instructions, and Engine Break‑in Procedure
in the Operation section.
NOTE: EFI models ‑ Engine must have a fully charged battery to start the engine.
!
CAUTION
Never start or operate your outboard (even momentarily) without water circulating through all the cooling water
intake holes in the gearcase to prevent damage to the water pump (running dry) or overheating of the engine.

Mercury 45 Specifications

General

Horsepower	45 HP
Cylinders	3
Starting	Electric
Full Throttle RPM Range	5000-6000 RPM
Steering	Remote
Exhaust	Through Prop
Shaft Length	20 in