Yamaha F115 Owners Manual

 
Operation 
55
NOTE:
 
For cooling system flushing instructions, see 
page 57. 
Cruising in turbid water 
Yamaha strongly recommends that you use
the optional chromium-plated water pump kit
(not available for some models) if you use
the outboard motor in turbid or muddy water
conditions. 

 
56 
Maintenance 
EMU31480 
Specifications
NOTE:
 
“(AL)” stated in the specification data below
represents the numerical value for the alumi-
num propeller installed.
Likewise, “(SUS)” represents the value for
stainless steel propeller installed and “(PL)” 
for plastic propeller installed. 
EMU28218 
Dimension: 
Overall length: 
825 mm (32.5 in)
Overall width: 
498 mm (19.6 in)
Overall height L: 
F115TR 1609 mm (63.3 in)
Overall height X: 
1736 mm (68.3 in)
Transom height L: 
F115TR 516 mm (20.3 in)...

 
Maintenance 
57 
Recommended engine oil: 
4-stroke outboard motor oil
Engine oil grade API: 
API SE, SF, SG, SH, SJ, SL
Engine oil type SAE: 
SAE10W30 or SAE10W40
Lubrication: 
Wet sump
Engine oil quantity (excluding oil filter): 
4.3 L (4.55 US qt) (3.78 Imp.qt)
Recommended gear oil: 
Hypoid gear oil SAE#90
Gear oil quantity: 
F115TR 760.0 cm 
3
 
 (25.70 US oz) 
(26.81 Imp.oz)
LF115TR 715.0 cm 
3
 
 (24.17 US oz) 
(25.22 Imp.oz) 
Tightening torque for engine: 
Spark plug: 
25.0 Nm (18.4 ft-lb) (2.55...

 
Maintenance 
58 
It is advisable to have your outboard motor
serviced by an authorized Yamaha dealer
prior to storage. However, you, the owner,
with a minimum of tools, can perform the fol-
lowing procedures.
CAUTION:
 
ECM01080  
 
To prevent problems which can be
caused by oil entering the cylinder from
the sump, keep the outboard motor in
the attitude shown when transporting
and storing it. If storing or transporting
the outboard motor on its side (not up-
right), put it on a cushion after...

 
Maintenance 
59 
when starting or during operation. 
 
Keep hands, hair, and clothes away
from the flywheel and other rotating 
parts while the engine is running. 
6. Run the engine at a fast idle for 10–15
minutes in neutral position while supply-
ing fresh water.
7. Just prior to turning off the engine, quick-
ly spray “Yamaha Stor-Rite Engine
Fogging Oil” (Part No. LUB-STRRT-12-
00) alternately into each carburetor/
each intake manifold. When properly
done, the engine will smoke excessively
and...

 
Maintenance 
60 
ea. 
 
Keep batteries away from fire, sparks,
or open flames (for example: welding
equipment, lighted cigarettes, and so
on.) 
 
DO NOT SMOKE when charging or han-
dling batteries.
KEEP BATTERIES AND ELECTROLYTIC 
FLUID OUT OF REACH OF CHILDREN. 
Batteries vary among manufacturers. There-
fore the following procedures may not al-
ways apply. Consult your battery
manufacturer’s instructions.
Procedure
1. Disconnect and remove the battery from
the boat. Always disconnect the black...

 
Maintenance 
61 
tion. Water will leak out of the connector
instead of cooling the engine, which can
cause serious overheating. Be sure the
connector is tightened securely on the fit- 
ting after flushing the engine.
NOTE:
 
 
When flushing the engine with the boat in
the water, tilting up the outboard motor un-
til it is completely out of the water will
achieve better results. 
 
For cooling system flushing instructions, 
see page 57. 
EMU28450 
Cleaning the outboard motor 
After use, wash the...

 
Maintenance 
62 
EMU30563 
Maintenance chart
NOTE:
 
 
Refer to the sections in this chapter for explanations of each owner-specific action. 
 
The maintenance cycle on these charts assume usage of 200 hours per year and regular
flushing of the cooling water passages. Maintenance frequency should be adjusted when
operating the engine under adverse conditions such as extended trolling. 
 
Disassembly or repairs may be necessary depending on the outcome of maintenance
checks. 
 
Expendable or...

 
Maintenance 
63 
EMU28874 
Maintenance chart (additional) 
EMU28910
NOTE:
 
When using lead or high-sulfur gasoline, inspecting valve clearance may be required more 
frequently than every 500 hours. 
ThermostatInspection / replace-
ment
Throttle link / throttle 
cable / throttle pick-up 
timingInspection / adjustment
Water pumpInspection / replace-
ment
Engine oil Inspection / change
Oil filter (cartridge) Change
Spark plug(s)Cleaning / adjustment / 
replacement
Timing beltInspection / replace-
ment...

 
Maintenance 
64 
EMU28931 
Greasing 
Yamaha marine grease (Water resistant grease) 
F115, LF115 
EMU28952 
Cleaning and adjusting spark plug
WARNING
 
EWM00560  
When removing or installing a spark plug,
be careful not to damage the insulator. A
damaged insulator could allow external
sparks, which could lead to explosion or 
fire. 
The spark plug is an important engine com-
ponent and is easy to inspect. The condition
of the spark plug can indicate something
about the condition of the engine. For...