Performance Data and Specifications
L1276A2
Notes:
1. Max. cruise rpm for High Output and Medium Duty ratings is1900 or 200 rpm below highest attainable rpm-
whichever is lower.
Curves:
A.
Maximum torque at flywheel.
B.
Flywheel power. Prop shaft power is 3-3.5% lower due to marine reduction
gear power loss.
C.
Theoretical prop power draw (3.0 exponent).
D.
Fuel consumption based on theoretical propellar HP draw.Your fuel consumption will vary higher or lower depending
on your vessel and operating conditions.
Output rating
CONTINUOUS
MEDIUM
HIGH OUTPUT
FWHP (kW)
340 (252)
425 (315)
525 (389)
Maximum RPM
1800 2100 2100
Cylinders / Con
fi
guration / Cycle
6 / Inline / 4
6 / Inline / 4
6 / Inline / 4
Displacement CID (ltr)
763 (12.5)
766 (12.5)
766 (12.5)
Aspiration
All Models:
Turbocharged Aftercooled
Bore x Stroke in (mm)
All Models
: 5 x 6.5 (127 x 165)
Cooling
(General)
Coolant circ pump
fl
ow - US gal (ltr)
73 (232)
85 (277)
85 (277)
Heat rejection to jacket water - BTU-min
6,690 8,363 10,331
Cooling
(Heat Exchanger)
HE engine coolant capacity - US gal (ltr)
14.25 (54)
14.25 (54)
14.25 (54)
Rawwater intake/discharge dia. - in (mm)
3 (75)
3 (75)
3 (75)
Rawwater pump
fl
ow - gpm (lpm)/rpm
92 (348)
99 (374)
99 (374)
Rawwater pump max. suction head - in (m)
39 (1)
39 (1)
39 (1)
Max. raw water temp. at inlet -°F (°C)
86° (30°)
86° (30°)
86° (30°)
Cooling
(Keel Cooled)
Based on 70° F seawater and minimum full boat speed of 8 knots.
Return water from keelcooler
70°-130° F.
70°-130° F.
70°-130° F.
KC engine coolant capacity - US gal (ltr)
11.75 (44)
11.75 (44)
11.75 (44)
Water hose inside diameter - in (mm)
3 (75)
3 (75)
3 (75)
Head diameter - in
All Models:
2” NPT or 3” hose barb
Turbo tube length - ft (m)
48 (14.6)
64 (19.5)
80 (24.4)
1 in. plain round tube length - ft (m)
112 (34.1)
140 (42.7)
174 (53)
Skin cooler aluminum - sq ft (m
2
)
51 (4.7)
64 (5.9)
80 (7.4)
Skin cooler steel - sq ft (m
2
)
170 (15.8)
212 (19.7)
263 (24.4)
Electrical
Voltage
All Models
: 24V standard (12V optional)
Min. battery capacity - 24 volt
All Models
: 2 x 225 amp hours - 1150 CCA
Battery cable size up to 10 ft run
“00” “00” “00”
Standard panel harness length - ft (m)
All Models
: 20 ft (6m) std, 40 & 60 ft optional
Air and Exhaust
Engine air consumption - cfm (m
3
/min)
816 (23.1)
1029 (29.1)
1264 (35.8)
Min. engine room vent area - sq in (m
2
)
240 (0.16)
301 (0.19)
370 (0.24)
Exhaust gas
fl
ow at - cfm (m
3
/min)
1819 (52)
2243 (63.5)
2815 (79.7)
Exhaust gas temperature -°F (°C)
738 (392)
725 (385)
736 (391)
Max. exhaust back pressure - in (mm) H
2
0
30 (762)
30 (762)
30 (762)
Suggested dry exhaust I.D. - in (mm)
5(125)
6(150)
6(150)
Suggested wet exhaust I.D. - in (mm)
8(203) 8(203) 8(203)
Fuel and Oil
Minimum fuel suction line - in (mm)
0.5 (12)
0.5 (12)
0.5 (12)
Minimum fuel return line - in (mm)
0.375 (10)
0.375 (10)
0.375 (10)
Maximum fuel pump head - in (m)
39 (1)
39 (1)
39 (1)
Crankcase oil capacity - US qts (ltr)
44 (42)
44 (42)
44 (42)
Other Data
Engine rotation (facing
fl
ywheel)
All Models
: Counter-Clockwise
Flywheel housing size
All Models
:
Std. SAE 1, 14” Std. (SAE 2, 11.5” opt)
Optional front PTO size
All Models
: SAE 4, 10” or SAE 3, 11.5”
Max operating down angle - front/rear
0°/12° 0°/12° 0°/12°
Approximate Weight*
Dry weight with HE, no gear - lbs (kg)
3210 (1456)
3210 (1456)
3210 (1456)
Dry weight, KC, no gear - lbs (kg)
3093 (1403)
3093 (1403)
3093 (1403)
L1276A2 Speci
fi
cations and Installation Data
L1276A2 Performance Data
Dealer
4420 14th Ave. NW., Seattle WA 98107
Tel: (206) 789-3880 • 1-800-762-0165 • Fax: (206) 782-5455
Information and dimensions subject to change without notice.
Northern Lights and Lugger are registered trademarks
of Northern Lights, Inc.
© 2005 All rights reserved. Litho USA. L654 3/08
www.northern-lights.com
Dimensions inch
(mm)
A length
69.94 (1776)
B width
46.02 (1169)
C height
41.31 (1049)
D mounts
34.55 (878)
E mounts
26.0 (660)
*Do NOT use for installation. Contact factory for current installation drawings.
High Output Rating
1
FWHP / kW / @ rpm
525 / 389 / 2100
Medium Duty Rating
1
FWHP / kW / @ rpm
425 / 315 / 2100
Continuous Duty Rating
FWHP / kW / @ rpm
340 / 252 / 1800
HIGH OUTPUT
1
A B C D
ft/lbs fwhp pdhp gph
1291 246 55 2.8
1609 368 95 4.6
1775 473 151 7.3
1775 541 224 11.4
1628 558 318 16.1
1435 546 438 22.0
1315 525 507 25.5
CONTINUOUS
A B C D
ft/lbs fwhp pdhp gph
-- -- -- --
1120 256 97.5 4.9
1114 297 154 7.5
1116 340 231 11.4
992 340 328 16.3
-- -- -- --
-- -- -- --
MEDIUM DUTY
1
A B C D
ft/lbs fwhp pdhp gph
1439 274 44.4 2.2
1440 329 76 3.8
1441 384 122 6.1
1517 432 181 9.2
1351 463 259 12.6
1211 461 354 17.3
1062 425 410 23.4
RATING
Curve
RPM
1000
1200
1400
1600
1800
2000
2100
