TOHATSU MFS 8B Service Manual page 25

B r e a k - i n o p e r a t i o n i s n e e d e d f o r t h e p u r p o s e o f
smoothening sliding surfaces between components such
as pistons and cylinder, piston rings, piston pins, crank
shaft, connecting rods, and intake and exhaust valves.
Break-in Operation...10 hours
Time 0
Operation Dead Slow or Idling
Running at the slowest
1. Start engine and check if gear shift can be moved smoothly.
2. After completing warm-up operation, check idling revolution
speed.
Idling Revolution Speed : - Neutral
950 r/min
Tachometer :
P/N. 3AC-99010-0
3. Shift gear into forward (F) and run dead slow for
approximately 10 minutes.
Dead Slow Revolution Speed :
900 r/min
4. Run at 2,000 r/min or half of WOT or less for initial 2
hours, then at 3,000 r/min or 3/4 of WOT or less for 1 hour.
5. Check that shifting into reverse (R) will not tilt up outboard
motor and allow water to run into boat.
Complete test run during break-in operation.
4st 8/9.8 2016
10 minutes
1/2 of WOT or less at
approximately 3,000
r/min
possible speed
2 hours 3 hours
3/4 of WOT at
3/4 of WOT or less at
approximately 4,000
approximately 4,000 r/min
WOT run for approximately 1
Short period WOT run
minute can be included every
can be included.
10 minutes of run.
High tension cord
10 hours
Regular Operation
r/min
1-13