Honda 99 Outboard Owners Manual

							SERVICING YOUR HONDA OUTBOARD MOTOR 
Propeller Replacement Removal 
Before replacing the propeller, remove 
the clip from the engine stop switch to 
prevent any possibility of the engine 
being started while you are working with 
the propeller. 
The propeller blades may have sharp 
edges, so wear heavy gloves to protect 
your hands. 
Remove the cotter pin, unscrew the castle 
nut, remove the washer, then remove the 
propeller and thrust washer. 
Installation 
THRUST WASHER COTTER PIN 
I. Install the propeller in the reverse 
order of removal. 
. 
Install the thrust washer with the 
grooved side toward the gear case. 
. 
Use a genuine Honda cotter pin and 
bend the pin ends as shown. 
69  
						

							STORAGE 
STORAGE PREPARATION 
Proper storage preparation is essential for 
keeping your outboard motor troublefree 
and looking good. The following steps 
will help to keep rust and corrosion from 
impairing your outboard motor’s function 
and appearance, and will make the engine 
easier to start when you USC the outboard 
motor again. 
Cleaning and Flushing 
Thoroughly clean and flush the outboard 
motor with fresh water after operation in 
dirty water or salt water. 
Cleaning 
Wash the outside of the outboard motor 
with clean, fresh water to remove mud, 
salt, seaweed, etc. 
Diengage the emergency engine stop 
switch clip from the engine stop switch, 
and pull the recoil starter rope several 
times to expel any water remaining in the 
water pump. 
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Touch up any damaged paint, and coat 
areas that may rust with a light film ofoil. 
Lubricate controls with a silicone spray 
lubricant. 
Flushing with the Honda 
Garden Hose .4dapter 
Unlatch the cnginc cover latch and 
remove the engine cover (p.55 ), and 
install the garden hose adapter. 
Attach a garden host from a fresh 
water faucet to the garden hose 
adapter. 
Turn on the fresh water supply, and 
verify that there is good water 
pressure at the outboard motor. 
Flush the engine with the fresh water 
for at least 10 minutes. 
GARDEN HOSE 
ADAPTER 
After flushing, remove the garden 
hose adapter, reinstall the engine 
cover.  
						

							STORAGE 
Flushing Without the Honda 
Garden Hose Adapter 
It is necessary to run the engine during the 
flushing procedure. For safety, remove 
the propeller from the outboard motor (p. 
69). 
ANTI-CAVITATION PLATE 
I. Place a container under the outboard 
motor, and fill it with clean, fresh 
water. The water level must be at 
least 2 inches above the 
antiventilation plate. 1~0TlCEl 
Running the engine without good 
water circulation can cause 
overheating and water pump 
damage. 
Damage caused by running the 
outboard motor without suffkient 
cooling water is not covered by the 
Distributor k Limited Warranty. 
2. Start the engine and run in (N) 
neutral at low speed for at least 
minutes. IO 
3. After flushing, stop the engine, 
remove the water contamer, and 
reinstall the propeller (p. 69). 
71  
						

							STORAGE 
Fuel 
Gasoline will oxidize and deteriorate in 
storage. Old gasoline will cause hard 
starting, and it leaves gum deposits that 
clog the fuel system. If the gasoline in 
your fuel tank and carburetor deteriorates 
during storage, you may need to have the 
carburetor and other fuel system 
components serviced or replaced. 
The length of time that gasoline can be 
left in your fuel tank and carburetor 
without causing functional problems will 
vary with such factors as gasoline blend, 
your storage temperatures, and whether 
the fuel tank is partially or completely 
tilled. The air in a partially filled fuel tank 
promotes fuel deterioration. Very warm 
storage temperatures accclcrdte fuel 
deterioration. Fuel deterioration problems 
may occur within a few months, or even 
less if the gasoline was not fresh when 
you tilled the fuel tank. 
The Distributor k Limited Warranty does 
not cover fuel system damage or engine 
72 
performance problems resulting from 
neglected storage preparation. 
You can void fuel deterioration problems 
by draining the fuel tank and carburetor. 
I. Disconnect the fuel hose from the 
outboard motor. 
DRAIN SCREW 
2. With the outboard motor in a vertical 
position, place an approved gasoline 
container below the fuel drain outlet, 
and use a funnel to avoid spilling 
fuel. Loosen the drain screw to drain 
fuel from the carburetor. 3. 
4. Gasoline is highly flammable and 
explosive. 
You can be burned or seriously 
injured when handling fuel. 
l Stop the engine and keep heat, 
sparks, and flame away. 
l Handle fuel only outdoors. 
l Wipe up spills immediately. 
After the fuel has drained from the 
carburetor, tighten the drain screw 
securely. 
Drain the portable fuel tank into an 
approved gasoline container, or If 
you need to store fuel in the fuel tank, 
you can extend fuel storage life by 
filling the fuel tank with fresh 
gasoline and adding a fuel stabilizer 
that is formulated for that purpose. 
Firmly close the fuel cap vent knob.  
						

							STORAGE 
Engine Oil STORAGE PRECAUTIONS 
I. 
2. 
3. 
4. 
5. Change the engine oil and the oil 
filter (p.56 - 57). 
Remove the spark plugs (p.62), and 
remove the clip from the engine or 
emergency stop switch. Select a well-ventilated storage area. If 
possible, avoid storage areas with high 
humidity. 
Pour a tablespoon (5 - 10 cc) of clean 
engine oil into each cylinder. 
Pull the starter rope several times to 
distribute the oil in the cylinders. 
Reinstall the spark plugs (p.63). 
u CARRYING HANDLE 
To carry the outboard motor, hold it by 
the carrying handle, or hold by the 
carrying handle and the lug beneath the 
engine cover latch, as shown. 
Lifting the outboard motor by the engine 
cover, or using the installed outboard 
motor as a handle or lever to move the 
boat, can damage the outboard motor. 
If your portable fuel tank contains 
gasoline, store it away from any appliance 
that operates with a flame, such as a 
furnace, water heater, or clothes dryer. 
Als avoid any area with a spark- 
producing electric motor, or where power 
tools are operated. 
73  
						

							STORAGE 
Store the outboard motor either vertically 
or horizontally with the tiller handle side 
up. 
t
----- PROTECTOR CASE PROTECTOR 
If storing horizontally, be sure to fold the 
tiller handle, and the outboard motor rests 
on its case protectors. Be sum all water 
has drained from the outboard motor 
before placing it on its side, so no residual 
water can enter the engine exhaust port. 
Any other horizontal storageposition may 
CUIISL’ damage lx- ail leakage. Cover the outboard motor to keep out 
dust. Do not use sheet plastic as a dust 
cover. A nonporous cover will trap 
moisture, promoting rust and corrosion. 
REMOVAL FROM STORAGE 
Check your outboard motor as described 
in the BEFORE OPERATION chapter of 
this manual. 
If the cylinders were coated with oil 
during storage preparation, the engine 
may smoke briefly at startup. This is 
normal. 
74  
						

							TRANSPORTING 
WITH OUTBOARD MOTOR 
INSTALLED ON BOAT 
When trailering a boat with the outboard 
motor attached, leave the engine in the 
normal running position, if possible, and 
tighten the steering friction lever securely 
(p.46). 
If there is insuffrcient road clearance in 
the normal running position, then tilt the 
outboard motor and use a motor support 
bar, or remove the outboard motor from 
the boat. Refer to the manufacturer’s 
instructions for using a motor support bar. 
MOTOR SUPPORT BAR 
(commercially available) 
WITH OUTBOARD MOTOR 
REMOVED FROM BOAT 
Secure the outboard motor in either the 
vertical or horizontal position shown on 
p.74. 
- m -J 
LLJ CARRYING HANDLE 
To carry, hold the outboard motor by the 
carrying handle, or hold by the carrying 
handle and the lug beneath engine cover 
lock lever, as shown. 
lNoTlCEl I 1 
Lifting the outboard motor by the engine 
cover, or using the installed outboard 
motor as a handle or lever to move the 
boat, can damage the outboard motor: 
75  
						

							TAKING CARE OF UNEXPECTED PROIBLEMS 
ELECTRIC STARTER WILL 
NOT OPERATE 
I. Check battery. 
2. Check fuses. 
3. Use emergency starting procedure (p. 
40), then take outboard motor to an 
authorized Honda Marine dealer, or 
refer to the shop manual. 
Possible Cause 
Battery connections loose or corroded. 
Battery discharged. 
Fuse(s) burnt out. 
Starter malfunction, switch malfunction, 
or electrical problem in the starting 
circuit. 
Correction 
Clean and tighten battery connections. 
Recharge battery. 
Replace fuse(s) (p.8 I). 
Replace or repair faulty components as 
necessary. 
76  
						

							TAKING CARE OF UNEXPECTED PROBLEMS 
ENGINE WILL NOT START 
I. Check emergency stop switch clip. 
2. Check control positions. 
Possible Cause 
Clip not inserted in stop switch. 
Gearshift lever or control lever not in 
neutral position. 
Choke OPEN (tiller-handle and manual 
choke type). 
Throttle grip not in START position 
(tiller-handle type). 
Fast idle lever raised (side-mount type). 
Correction 
Insert clip in stop switch. 
Shift to neutral (p.15). 
Pull choke knob to CLOSED position, 
unless engine is warm (p. 14). 
Turn throttle grip to START position (p. 
36). 
Leave fast idle lever OFF, unless engine 
is warm (p.39).  
						

							TAKING CARE OF UNEXPECTED PROIBLEMS 
Fuel vent closed (portable fuel tank). Open fuel tank vent (p.24). 
Fuel hose not primed. 
Fuel pump filter or fuel tank filter 
clogged. Squeeze priming bulb (p.33). 
Replace fuel filters (p. 65). 
Bad fuel; boat stored without treating or 
draining gasoline, or refueled with bad 
gasoline. Drain fuel tank and carburetors (p.72). 
Refill with fresh gasoline (p.64). 
4. Remove and inspect spark plugs. Spark plugs faulty, fouled or improperly Clean, gap or replace spark plugs (p. 
gamed. 62). 
Spark plugs wet with fuel (flooded 
engine). 
‘Carburetor malfunction, fuel pump 
failure, ignition malfunction, stuck 
valve, etc. Dry and reinstall spark plugs. Start 
engine with choke and throttle open. 
Replace or repair faulty components as 
necessary.  5. Take outboard motor to an authorized 
Honda Marine dealer, or refer to the 
shop manual. 
78