L844D

L844D Speci cations and Installation Data L844D Speci cations and Installation Data L844D Performance Data

Output rating Medium Performance

High Output Rating

1 FWHP / kW / @ rpm

40 / 22.2 / 2800

FWHP (kW) 30 (22.2) 40 (29.6)

Medium Duty Rating

1 FWHP / kW / @ rpm

30 / 29.6 / 2400

Maximum RPM 2400 2800 Cylinders/Con guration/Cycle 4 / Inline / 4 Displacement CID (ltr) 121 (1.9) Aspiration Natural Bore x Stroke in (mm) 3.30 x 3.50 (84 x 90) Cooling
(General) Coolant circ pump ow - US gpm (lpm) 14.2 (54) 20.1 (76) Heat rejection to marine jacket water - BTU-min 1176 1567 Freshwater system capacity - US gal (ltr) 1.4 (5.3) Cooling
(Heat Exchanger) Raw water intake dia. - in (mm) 75 (19) Raw water discharge dia. - in (mm) 75 (19) Raw marine water pump ow - gpm (lpm) 10.2 (39) Raw water pump max. suction head - in (m) 39 (1) Max. raw water temp. at inlet -°F (°C) 86° (30°) Cooling
(Keel Cooled) Based on 70° F seawater and minimum full boat for boat speed of 8 knots. Return water from keelcooler 70°-130° F. Water hose inside diameter - in (mm) 1.25 (31.5) Head diameter - in 1.0 Turbo tube length - ft (m) 2 (0.61) Skin cooler aluminum - sq ft (m
2 ) 4.5 (0.42) 6 (5.6) Skin cooler steel - sq ft (m
2 ) 15 (1.4) 20 (1.89) Electrical
Notes: Curves: 1. Ratings based on SAE J-816B. Maximum cruise rpm for Medium Duty and High Output is 1900 or 200 rpm below highest attainable rpm-whichever is lower. Continuous max cruise is 1800 rpm. A. Maximum torque at flywheel. B. Flywheel power. Prop shaft power is 3-3.5% lower due to marine reduction gear power loss. Voltage 12V standard ground (see options) Min. battery capacity
E . Specific fuel consumption. C. Theoretical prop power draw (3.0 exponent). D. Calculated fuel consumption based on theoretical propeller power draw.Your fuel consumption will vary higher or lower depending on your vessel and operating conditions. 120 amp hours Battery cable size up to 10 ft run #1 Standard panel harness length - ft (m) 20 ft (6m) std, (10, 20, 40 ft opt) Air and Exhaust Engine for boats air consumption - cfm (m
3 /min) 72 (2.0) 101 (2.86) Min. engine room vent area - sq in (m
2 ) -- Exhaust gas ow at - cfm (m
3 /min).. 169 (4.8) Exhaust gas temperature -°F (°C) 1022 (550) Max. exhaust back pressure - in (mm) H
2 48 (1220) Suggested dry exhaust I.D. - in (mm) -- Suggested wet exhaust I.D. - in (mm) 2 (51)

Dimensions

Fuel and Oil Minimum fuel suction line - in (mm) 0.3125 (8) 0.3125 (8) Minimum fuel return line - in (mm) 0.3125 (8) 0.3125 (8) Maximum marine fuel pump head - in (m) 39 (1) 39 (1) Crankcase oil capacity - US qts (ltr) 8.4 (8.2) 8.4 (8.2) Other Data Engine rotation (facing ywheel) All: Counter-Clockwise Flywheel housing size All: Std. SAE 4 Optional front PTO size SAE # - inch All: SAE “3” PAd Maximum operating angle any direction All: 35° for less then 2 minutes Maximum installed operating angle All: 10° rear down - 0° front down Keel Cooled Weight - without gear Consult factory Heat Exchanger Weight - without gear Consult factory

Overall Dimensions L x W x H: 31 (789) x 20 (508) x 26.9 (602)

Dimensions given in inches (mm). Dimensions subject to change without notice. Contact dealer or visit www.northern-lights.com for current installation drawings.
* Based on 70° F seawater and minimom full boat speed of 8 knots. Return water from keecooler 70-130°F *Do NOT use for installation. Contact factory for current installation drawings.

Dealer

4420 14th Ave. NW., Seattle WA 98107 Tel: (206) 789-3880 • 1-800-762-0165 • Fax: (206) 782-5455

www.northern-lights.com