Service manual

GENERAL INFORMATION SERVICE MANUAL NUMBER 26
Page 1A-6 90-861329--1 MARCH 1999
Water Testing New Engines
Use care during the first 20 hours of operation on new MerCruiser engines or possible
engine failure may occur. If a new engine has to be water-tested at full throttle before the
break-in period is complete, follow this procedure.
1. Start engine and run at idle rpm until normal operating temperature is reached.
2. Run boat up on plane.
3. Advance engine rpm (in 200 rpm increments) until engine reaches its maximum rated
rpm.
IMPORTANT: Do not run at maximum rpm for more than 2 minutes.
Boat and Engine Performance
Boat Bottom
For maximum speed, a boat bottom should be as flat as possible in a fore-aft direction
(longitudinally) for approximately the last 5 ft (1.5 m).
72002
a
a-Critical Bottom Area
Index