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3, which both use the 843 engine. Model Numbers Model numbers give the unit's application, block model, aspiration, and RPM: M - NL N, W, 3 M - Northern Lights marine generator set Model number of engine block N - series designation Bore Cylinders W - winding in gen.
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INTRODUCTION ReadiNG a PaRtS PaGe IMPORTANT: Before selecting parts, be sure that you are choosing parts from the correct page. Check the model designation at the page top. Do not use this illustration for parts purchasing. ELECTRICAL SYSTEM ALTERNATOR ASSEMBLY: M - NL843 PART NUMBER QTY.
GROUP 1 – ENGINE Cylinder Head 843NW3cylhead P843-3 5/13 1 - 8...
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revised 1-26-10 GROUP 1 – ENGINE Cylinder Head PART NUMBER DESCRIPTION SERIAL NUMBER 111011260 Cylinder Head Assembly (Marine, includes keys 1-14) 111011280 Cylinder Head Assembly (Industrial, includes keys 1-14) 064210018 Expansion Plug, 18 mm 064210030 Expansion Plug, 30 mm 064210025 Expansion Plug, 25 mm 064210010 Expansion Plug, 10 mm...
GROUP 1 – ENGINE Rocker Arm Assembly 843NW3rockerarm PART NUMBER DESCRIPTION SERIAL NUMBER 120036990 Rocker Arm Assembly (Marine, includes keys 2-7, 16-17) 120037070 Rocker Arm Assembly (Industrial, includes keys 2-7, 16-17) 120356131 Intake Rocker Arm 120356141 Exhaust Rocker Arm 199486220 Screw 020109076 120316281...
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GROUP 1 – ENGINE Rocker Arm Cover Marine 843NW3rockercover PART NUMBER DESCRIPTION SERIAL NUMBER 111217780 Rocker Arm Cover 111996410 Gasket 110666210 Oil Stopper 110666060 Steel Wool 015600406 Screw 140996270 Gasket 024600010 Cap Nut 198436010 052100400 O-ring 110566080 Breather Valve 011100408 Bolt 011310660 Bolt...
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GROUP 1 – ENGINE Rocker Arm Cover Industrial 843NW3rockercoverind PART NUMBER DESCRIPTION SERIAL NUMBER 111217820 Rocker Arm Cover 111996410 Gasket 110666210 Oil Stopper 110666060 Steel Wool 015600406 Screw 140996270 Gasket 024600010 Cap Nut 198436010 052100400 O-ring 110566080 Breather Valve 011100408 Bolt 011310660 Bolt...
GROUP 2 – INTAKE AND EXHAUST Air Filter and Housing Marine A-10262, A-10312 / C-5444 PART NUMBER DESCRIPTION SERIAL NUMBER 10-22004 Connector, Air Inlet 135996950 Gasket, Air Intake Mounting 12-01131 Capscrew, Hex Head M6 x 1.0 x 20 mm 15-99131 Wave Washer M6 S/S 18-22002 Hose 1-3/4"...
GROUP 2 – INTAKE AND EXHAUST Air Filter and Mounting Industrial 843NW3aircleaner PART NUMBER DESCRIPTION SERIAL NUMBER 135016300 Air Filter Assembly (includes keys #13 - 16) 19-00036 Clamp #36 135597860 Hose 135876600 Bracket 135976420 Bracket 195816100 Lifting Eye 011510820 Bolt 011510816 Bolt 011510825...
GROUP 3 – COOLING SYSTEM Raw Water Pump and Mounting Marine A-4779/ B-3842 PART NUMBER DESCRIPTION SERIAL NUMBER 16-13101 O-ring 2-1/2 x 2-3/4 x 1/8 14-00811 Nut M10 x 1.5 15-00802 Lock Washer M10 21-00129 Fitting 1/2 NPT x 3/4 HB 25-12057 Raw Water Pump (see parts detail)
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GROUP 3 – COOLING SYSTEM Raw Water Pump Detail A-3706/ C-2204 PART NUMBER DESCRIPTION SERIAL NUMBER •• 25-12057 Raw Water Pump Assembly (includes keys 1 - 17) • 25-12004 Repair Kit (includes keys 3- 9, 11) 25-12058 Raw Water Pump Body 25-12059 Shaft 25-12060...
GROUP 4 – FUEL SYSTEM Injection Pump and Lines 843injectionlines P843-3 5/13 4 - 0...
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GROUP 4 – FUEL SYSTEM Injection Pump and Lines PART NUMBER DESCRIPTION SERIAL NUMBER 131017592 Injection Pump Assembly 131426310 Shim Set 023100008 010800820 Bolt 131426200 Gasket 131406360 Injector Assembly 131606451 Return Line 131507450 Injection Line #1 131507460 Injection LIne #2 121507470 Injection LIne #3 199106021...
GROUP 4 – FUEL SYSTEM Governor and Timing Gear Case 843timinggear P843-3 5/13 4 - 2...
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GROUP 4 – FUEL SYSTEM Governor and Timing Gear Case PART NUMBER DESCRIPTION SERIAL NUMBER 165106810 Timing Gear Case - Marine (white) (includes key #2) 165106800 Timing Gear Case - Industrial (blue) 030300414 Spring Pin 165996550 Gasket 198636160 Oil Seal 125046270 Governor Lever Assembly (includes keys 6- 8)
GROUP 4 – FUEL SYSTEM Fuel Filter and Piping 843NWfuelfilter P843-3 5/13 4 - 4...
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GROUP 4 – FUEL SYSTEM Fuel Filter and Piping PART NUMBER DESCRIPTION SERIAL NUMBER 130306190 Fuel Filter Assembly (includes keys #2 - 5) 24-52020 Fuel Filter 130326051 Gasket 130436011 Joint Bolt 130396030 Plug 130976470 Bracket (Marine) 130976450 Bracket (Industrial) 130976460 Bracket (Marine) 130976440...
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updated 12-7-10 GROUP 4 – FUEL SYSTEM USCG SAE J1527 ISO 7840 Fuel Lines M843N up to s/n xxxx-46623C NL 843N All A-11853 / B-9278 PART NUMBER DESCRIPTION SERIAL NUMBER 10-51099 Fuel Manifold 1/4 NPT 12-01102 Capscrew, Hex Head M6 x 1.0 x 16 mm S/S 15-00610 Lock Washer, Helical M6 S/S 21-31624...
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updated 12-7-10 GROUP 4 – FUEL SYSTEM USCG SAE J1942 ABS Fuel Lines M843N up to s/n xxxx-46623C A-118520 / B-9278 PART NUMBER DESCRIPTION SERIAL NUMBER 10-51099 Fuel Manifold 1/4 NPT 12-01102 Capscrew, Hex Head M6 x 1.0 x 16 mm S/S 15-00610 Lock Washer, Helical M6 S/S 21-31624...
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updated 12-7-10 GROUP 4 – FUEL SYSTEM USG A-1 SAE J1527 ISO 7840 Fuel Lines M843N from s/n xxxx-46624C B-9827 Part Number Description Serial Number 21-31624 Plug, Hex Head Brass 1/4 NPT 21-51204 Male Elbow, 45°, Brass. 1/4NPT X 5/16-45T 21-50054 Male Elbow, 45°, Brass.
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updated 12-20-10 GROUP 4 – FUEL SYSTEM USG A-1 SAE J1942 ABS Fuel Lines M843N from s/n xxxx-46624C B-9827 Part Number Description Serial Number 21-31624 Plug, Hex Head Brass 1/4 NPT 21-00600 Male Elbow, 45°, Steel 1/4NPT X 5/16-37T 21-05404 Male Elbow, 45°, Steel 1/4NPT X 1/4-37T 18-58502 Hose Assembly 1/4”...
GROUP 4 – FUEL SYSTEM Fuel Feed Pump feedpump843 PART NUMBER DESCRIPTION SERIAL NUMBER •• 130506140 Feed Pump Assembly (includes keys #1 - 15) 130516080 Housing* 130516081 Spring 130516082 Piston 130516083 Spring 130516084 Diaphragm 130516085 130516086 Lever 131226180 O-ring 130516087 Spring 130516088 Guide*...
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GROUP 5 – ELECTRICAL SYSTEM Engine Electrical - 12 & 24 Volt Standard Ground Marine Applications A-4786, A-4985/ C-2490 P843-3 5/13 5 - 0...
GROUP 5 – ELECTRICAL SYSTEM Engine Electrical - 12 & 24 Volt Standard Ground Marine Applications PART NUMBER DESCRIPTION SERIAL NUMBER 22-42055 Temperature Sender 385720110 Temperature Switch 95°C 185246011 Oil Pressure Switch 22-41016 Oil Pressure Sender 22-42047 Relay, 12 Volt SPDT 22-40085 Relay, 24 Volt SPDT 22-40391...
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GROUP 5 – ELECTRICAL SYSTEM Engine Electrical - 12 & 24 Volt Isolated Ground Marine Applications A-6054, A-5777/ C-2490 P843-3 5/13 5 - 2...
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updated 12-9-10 GROUP 5 – ELECTRICAL SYSTEM Engine Electrical - 12 & 24 Volt Isolated Ground Marine Applications PART NUMBER DESCRIPTION SERIAL NUMBER 22-44810 Temperature Sender 22-40358 Temperature Switch 95°C 22-40236 Oil Pressure Switch 22-42803 Oil Pressure Sender 22-42047 Relay, 12 Volt SPDT 22-40085 Relay, 24 Volt SPDT 22-40391...
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GROUP 5 – ELECTRICAL SYSTEM Engine Electrical - 12 Volt Standard Ground Industrial A-4786/ C-2490Bnl PART NUMBER DESCRIPTION SERIAL NUMBER 22-42055 Temperature Sender, 0-250 F Single Station 3/8 NPT 385720101 Temperature Switch 221°F/ 105°C 22-41016 Oil Pressure Sender 0-80 PSI, Single Station 1/8 NPT 185246011 Oil Pressure Switch 22-42047...
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GROUP 5 – ELECTRICAL SYSTEM Alternator, Starter, and Flywheel Housing 843NWalternator PART NUMBER DESCRIPTION SERIAL NUMBER 185727000 Tensioning Arm 185046320 Alternator, 12 Volt 40 Amp Standard Ground 22-42032 Alternator, 12 Volt 40 Amp Isolated Ground 011510825 Bolt 026109017 Washer 185976510 Bracket 011510816 Bolt...
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GROUP 5 – ELECTRICAL SYSTEM Alternator Isolated and Standard Ground A-7631, A-7632, A-7633/ D-2926 PART NUMBER DESCRIPTION SERIAL NUMBER 22-40333 Alternator (12V/51A ISO Ground) 22-40278 Alternator (24V/40A Standard Ground) 22-71052 Alternator (24V/35A ISO Ground) 34-42001 Pulley, 1-A x 2-1/2" x 5/8" ID 23-43107 Alternator Mounting Bracket 12-00711...
GROUP 5 – ELECTRICAL SYSTEM 12 Volt Starter Assembly Fig. 03-03 PART NUMBER DESCRIPTION SERIAL NUMBER •• 185086551 Starter (includes all keys) 185846468 Screw Set 185846610 Front Housing 185846615 Lever Assembly 185816340 Solenoid 185846616 Ball 185846617 Packing Ring 185846618 Armature 185846621 Bolt Set 185866391...
GROUP 5 – ELECTRICAL SYSTEM Alternator Assembly 12 Volt / 40 Amp Standard Ground 843alternator assembly PART NUMBER DESCRIPTION SERIAL NUMBER •• 185046320 Alternator Assembly (includes keys #1 - 14) 185446269 185436180 Pulley Assembly 185446270 Screw Set 185426210 Front Cover Assembly 185446271 Screw Set 185446272...
GROUP 5 - ELECTRICAL SYSTEMS S-1 Control Panel 12 & 24 Volt A-8551, A-8552/ B-5970 PART NUMBER DESCRIPTION SERIAL NUMBER •• 22-92110 S-1 Start/Stop Control Panel, 12 Volt (includes all keys) •• 22-92115 S-1 Start/Stop Control Panel, 24 Volt (includes all keys) 00-40013 Plate, S-1 Control Panel 22-90167...
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GROUP 5 – ELECTRICAL SYSTEM Series 1-B Start-Stop Control Panel 12 and 24 Volts A-8553/ B-5971 PART NUMBER DESCRIPTION SERIAL NUMBER •• 22-92120 S 1-B Start/ Stop Control Panel - 12 Volt (includes all keys) •• 22-92125 S 1-B Start/ Stop Control Panel - 24 Volt (includes all keys) 28-90003 Plate...
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GROUP 5 – ELECTRICAL SYSTEM Flush Mount Dual Station Control Panel 12 & 24 Volt Marine Application - VDO Standard Line Black Bezel Gauges A-11322, A-11323/ C-2441 PART NUMBER DESCRIPTION A-4732, A-4597/ C-2441 SERIAL NUMBER •• 22-91211 S-3C Control Panel, 12 Volt (includes all keys) ••...
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GROUP 5 – ELECTRICAL SYSTEM S-3B Control Panel 12 & 24 Volt VDO Ocean Line Black Bezel Gauges A-11320, A-11321 C-2470 PART NUMBER DESCRIPTION SERIAL NUMBER •• 22-91201 S-3C Control Panel, 12 Volt (includes all keys) •• 22-91202 S-3C Control Panel, 24 Volt (includes all keys) 39-40008 Enclosure...
updated 9-15-09 GROUP 5 – ELECTRICAL SYSTEM Belt Guard Assembly Marine A-5004, A-5020/ B-3986 PART NUMBER DESCRIPTION SERIAL NUMBER 00-73143 Belt Guard, Small Frame Alternators (without PTO) 00-73148 Belt Guard, Small Frame Alternators (with PTO) 00-08402 Belt Guard, Medium Frame Alternators (without PTO) 00-08401 Belt Guard, Medium Frame Alternators...
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GROUP 6 – GASKET SETS Gasket Kit PART NUMBER DESCRIPTION SERIAL NUMBER •• 29-03102 Gasket Kit (Marine, includes all keys) • 195907470 Gasket Kit (Industrial, includes keys #1 - 39) 198636170 Oil Seal, Rear 052109076 O-ring, Oil Line 110996820 Gasket, Oil Pan 025100012 Seal Washer, Oil Pan Drain 165996540...
updated 4-8-11 GROUP 8 – FRAME AND MOUNTING Base Frame Assembly M843N up to s/n xxxx-46623C A-7843 & A-7893 / D-3012 PART NUMBER DESCRIPTION SERIAL NUMBER 39-83124 Base Frame, Steel 39-83123 Base Frame, Aluminum 23-83123 Bracket 12-01100 Capscrew, Hex Head M14 x 1.5 x 30 mm 15-01402 Lock Washer, Helical M14 33-85402...
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revised 4-6-11 GROUP 8 – FRAME AND MOUNTING Steel Base Pan with Plateform Mounting M843N / PX312K2 from s/n xxxx-46624C D-4470B P843-3 5/13 8 - 2...
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revised 4-7-11 GROUP 8 – FRAME AND MOUNTING Kit, Steel Base Pan with Plateform Mounting M843N / PX312K2 from s/n xxxx-46624C PART NUMBER DESCRIPTION SERIAL NUMBER 39-83128 Base Pan, Steel 23-83123 Bracket, Front Engine Mtg 12-09408 Capscrew, Hex Head M14 x 1.5 x 25 mm 15-09402 Lock Washer 33-85402...
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updated 9-15-09 GROUP 8 – FRAME AND MOUNTING Base Frame Assembly Industrial Application A-7930A/ B-6380B PART NUMBER DESCRIPTION SERIAL NUMBER 39-83126 Base Frame 23-83123 Bracket 12-01100 Capscrew, Hex Head M14 x 1.5 x 30 mm 15-01402 Lock Washer, Helical M14 15-01401 Flat Washer M14 12-00048...
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updated 5/21/13 GROUP 9 – ACCESSORIES AND OPTIONAL EQUIPMENT PTO Adapter Parts See PTO guard & related items on pages for Belt Guard Assembly A-8091/ D-3154 PART NUMBER DESCRIPTION SERIAL NUMBER •• 31-63105 PTO Adapter (includes all keys) 10-65401 PTO Clutch Housing, H-28 B-Pad 23-63103 Engine/ PTO Support Bracket, Right Hand 23-63104...
GROUP 9 – ACCESSORIES AND OPTIONAL EQUIPMENT Electric Clutch A-6291 & A-6346/ C-3020 PART NUMBER DESCRIPTION SERIAL NUMBER 34-60031 Electric Clutch Assembly (12 volt) 34-60032 Electric Clutch Assembly (24 volt) 12-00513 Capscrew, Hex Head 1/2-13 x 1-1/4 15-00007 Flat Washer M12 00-61003 Grommet 12-63800...
updated 12-8-10 GROUP 9 – ACCESSORIES AND OPTIONAL EQUIPMENT Oil Drain Kit Marine Application A-5024/ B-3990 PART NUMBER DESCRIPTION SERIAL NUMBER •• 36-70010 Oil Drain Pump Kit (with hose & connectors) 36-72002 Hand Pump Oil Drain Industrial Application A-6480 PART NUMBER DESCRIPTION SERIAL NUMBER 36-72003...
GROUP 9 – ACCESSORIES AND OPTIONAL EQUIPMENT Keel Cooling Conversion Marine Application - with Dry Exhaust A-11305/ P843 KC PART NUMBER DESCRIPTION SERIAL NUMBER 165206320 Cover (see Governor & Timing Gear Case) 11-12005 Gasket (see Governor & Timing Gear Case) 20-12019 End Cap 19-00044...
page updated 9-28-09 GROUP 9 – ACCESSORIES AND OPTIONAL EQUIPMENT Coolant Recovery Tank Drawing for illustrative purposes only - your model may vary. A-10342/ B-8022 PART NUMBER DESCRIPTION SERIAL NUMBER 310550130 Coolant Recovery Tank 222300090 Coolant Recovery Tank Mounting Bracket 12-01102 Capscrew, Hex Head, M6 x 1.0 x 16 mm S/S 15-00610...
GROUP 9 – ACCESSORIES AND OPTIONAL EQUIPMENT Remote Expansion Tank Marine A-5931A/ D-2345 PART NUMBER DESCRIPTION SERIAL NUMBER 10-12002 Tank Assembly (includes keys #2 & #16 - #17) 21-52245 Male Elbow, Brass 1/4 NPT x 5/16-45T 21-51093 Male Connector, Brass 1/2 NPT x 1/2 HB 21-71093 Male Connector, Brass 3/8 NPT x 1/2 HB 31-12001...
GROUP 9 – ACCESSORIES AND OPTIONAL EQUIPMENT Low Coolant Level Switch/ Gauge A-10948/ C-6066 PART NUMBER DESCRIPTION SERIAL NUMBER 22-10003 Coolant Level Switch/ Gauge 23-73106 Bracket, Coolant Level Switch/ Gauge 00-73146 Lifting Eye, Front 12-00712 Capscrew, Hex Head M8 x 1.25 x 25 mm 15-00702 Lock Washer, Helical M8 12-00031...