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...

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...

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...

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 
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...

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...

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...

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....

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...

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...