Yamaha SR230, Owner'S/Operator'S Manual

Page: 35 / 118

2-9
2-8
Reverse
The jet pump gates are dropped all the
way down over the jet nozzles. Jet thrust
is redirected toward the bow of the boat,
which moves the boat backward.
FUEL TANK FILLER CAP
To remove the fuel tank filler cap, turn it
counterclockwise.
1 Fuel tank filler cap
Be sure to tighten the cap securely
before operating.
GAUGES
1. Speedometer
This meter shows the boat speed in
miles per hour (mph).
2. Tachometers
The Sport Boat has two tachome-
ters which display engine rpm. The
one on the left is for the port engine.
The one on the right is for the star-
board engine. For cruising, adjust
the throttle levers so both engines
are running at the same rpm.
NOTE: Because of the mechanical
throttle linkage, the throttle levers may
not be exactly even with one another
when the engines are running at the
same rpm.
F
EATURES
& F
UNCTIONS
2
10
20
30
35
40 45
50
55
60
1
2
3
4
5 6
7
8
9
10
11
RPM
x 1000
MPH
1
2
3
4
5 6
7
8
9
10
11
RPM
x 1000
I I I I I I I I I I I
S
E
SE
FUEL
E
F
1/2
SPEEDOMETER
NOTE: This Sport Boat is equipped
with a mechanical interlock that pre-
vents shift lever movement unless both
throttle levers are put in the idle posi-
tion first. It also has a start-in-gear pro-
tection neutral switch that prevents the
engines from cranking if the shift lever
is not in Neutral.
1 Forward
2 Neutral
3 Reverse
The shift lever controls the direction of
travel.
The drive line on the Sport Boat is
direct drive, so jet thrust is always
being produced while the engines are
running. The direction of the boat is
controlled by jet pump gates which
direct the flow of the jet thrust as fol-
lows:
Forward
The jet pump gates are lifted all the
way up. All jet thrust is to the rear,
which moves the boat forward.
Neutral
The jet pump gates are dropped down
part way over the jet nozzles. Some jet
thrust is to the rear and some jet thrust
is redirected forward. This balance of
thrust acts like “neutral” to keep the
boat from moving.
Leave the throttles in the idle posi-
tion when Neutral is selected. The
boat will start moving as if it was in
Forward or Reverse if engine speed
is increased above idle in Neutral.
2
F
EATURES
& F
UNCTIONS
WARNING
1
10
20
30
35
40 45
50
55
60
1
2
3
4
5 6
7
8
9
10
11
RPM
x 1000
MPH
1
2
3
4
5 6
7
8
9
10
11
RPM
x 1000
I I I I I I I I I I I
S
E
SE
FUEL
E
F
1/2
TACHOMETERS
3
2
1
*SR230(2003)-OwnMnl 3/21/03 2:09 PM Page 2-8