TOHATSU MFS 4 Service Manual

1-12
Service Information
4st 4/5/6 2011
5. Break-in Operation
1. Break-in operation is needed for the purpose of smoothening
sliding surfaces between components such as pistons and
cylinder, piston rings, piston pins, crank shaft, connecting
rods, and intake and exhaust valves.
6. Test Run
1. Start engine and check if gear shift can be moved smoothly.
2. After completing warm-up operation, check idling revolution
speed.
Complete test run during break-in operation.
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.
3. 3.Shift gear into forward (F) and run dead slow for
approximately 10 minutes.
1
1 High Tension Cord
Operation Dead Slow or Idling
1/2 of WOT or less at
approximately 3,000
r/min
3/4 of WOT or less at
approximately 4,000 r/min
WOT run for approximately 1
minute can be included every
10 minutes of run.
Short period WOT run
can be included.
Running at the slowest
possible speed
3/4 of WOT at
approximately 4,000
r/min
Regular Operation
Time 0 10 minutes 2 hours 3 hours 10 hours
Break-in Operation…10 hours
Idling Revolution Speed : - Neutral
1,300 r/min
RPM
Tachometer :
P/N. 3AC-99010-0
Dead Slow Revolution Speed :
1,150 r/min
RPM
MFS4-5-6Ech01110422.qxd 11.4.22 5:41 PM  ページ12

TOHATSU MFS 4 Specifications

General

Brand	TOHATSU
Model	MFS 4
Category	Outboard Motor
Language	English