SELVA MARINE Wahoo 15 Service Manual page 279

Symptom 1: Unstable engine idle speed, poor acceleration, poor performance, limited
engine speed, or engine stalls
Symptom 2
Intermittent spark
Incorrect fuel and
air amount supplied
Prime Start system
malfunction
6AG3J11
Cause 1
Spark plug malfunc-
tion
Spark plug cap mal-
function
Ignition coil mal-
function
Engine stop lan-
yard switch mal-
function
Charge coil mal-
function
Pulser coil malfunc-
tion
CDI unit malfunc-
tion
Pinched or kinked
fuel hose
Clogged fuel filter
Fuel pump malfunc-
tion
Carburetor malfunc- Throttle stop screw
tion not adjusted cor-
rectly
Pilot screw not
adjusted correctly
Malfunction of the
carburetor internal
parts
Prime Start mal-
function
Power bobbin mal-
function
Troubleshooting the outboard motor
Cause 2 Checking step
Check the spark
—
plug.
Check the spark
—
plug cap.
Check the ignition
—
coil.
Check the engine
— stop lanyard switch.
Check the charge
—
coil.
Check the pulser
—
coil.
Check the CDI unit.
—
Check the fuel
— hoses and fuel hose
joint.
Clean or replace
—
the fuel filter.
Disassemble and
— check the fuel
pump.
Adjust the throttle
stop screw.
Adjust the pilot
screw.
Disassemble and
check the carbure-
tor.
Check the Prime
—
Start.
Check the power
—
bobbin.
Refer
1
to
page
3-5
2
8-22
8-22
8-24
3
8-23
4
8-23
8-25
5
3-2
3-3
6
4-6
3-11
7
4-15
4-12
8
4-13
9
8-29
9-4