The coolant expansion tank on a Cummins QSB 5.9 will typically have (2) plugged 1/4″ NPT ports that are available to install a temp sender/switch.
SMX Deluxe Temperature Alarm Switch
Cummins Marine QSB 5.9 Coolant Temperature Switch Locations
- Seaboard StoreParts & Components
- Gaskets & O-Rings
- Complete Seawater Circuit Maintenance Kits
- Aftercooler O-Ring Kits
- MOTA Aftercooler O-Ring Kits
- Heat Exchanger O-Ring & Gasket Kits
- Valve Cover Gaskets
- Intake Manifold Gaskets
- Exhaust Manifold Gaskets
- Turbocharger Gaskets and Hardware
- Air Intake Gasket
- Seawater Pump Gasket & O-Ring Kit
- Cummins Graphite Turbo Charger to Exhaust Gasket & Bolt Kit
- Engine Crankshaft Seals
- Upper End Gasket Kits
- Engine Maintenance
- Aftercooler & Heat Exchanger Maintenance Kits
- Air Filter Kits
- Engine Belts
- Seawater Pump Impellers
- Cummins Marine Turbo Repair Kits
- Engine Gaskets & O-Rings
- Grease & Sealants
- SMX Super Impeller Puller & Extractor
- Thermostats
- Zincs
- Engine Crankshaft Seals
- Fittings, Bolts & Misc Parts
- Fleetguard Fuel, Oil & Coolant Filters
- Cummins Maintenance & Owners Manuals
- Cummins Engine Parts Catalogs
- Engine Hoses
- 6BT 5.9 210/220 Diamond Engine Hoses
- Early 6BTA 5.9 Diamond Hoses (1.5″ Raw Water Hoses)
- 6BTA 5.9 330/370 Diamond Engine Hoses
- 6CTA 8.3 430/450/480CE Diamond Engine Hoses
- QSB 5.9 Engine Hoses
- QSB 6.7 Engine Hoses
- QSB 6.7 Slimline Engine Hoses
- QSC 8.3 Engine Hoses
- QSL 9 Engine Hoses
- USCG Engine & Gear Hydraulic Hoses
- USCG Fuel Line Hose
- USCG High Pressure Hydraulic Oil Lines
- Engine Components
- Aftercoolers & Parts
- Heat Exchangers
- Seawater Pumps & Spare Parts
- Engine Mounts / Vibration Isolators
- Starter Motors
- Alternators
- Coolant Pumps & Parts
- Cylinder Heads & Gaskets
- Exhaust Manifolds
- Flywheels
- Bellhousings
- Transmission Oil Coolers
- Turbochargers & Parts
- PTO Pulley Kits
- Belt Tensioners
- Idler Pulley Kits
- Fuel Injection Pumps & Parts
- Injectors
- Air Heater Assemblies
- Coolant Expansion Tanks
- Fuel Oil Combo Block
- Engine Upgrades & Add-Ons
- Exhaust Systems
- Exhaust System Parts
- Factory Exhaust Elbows
- Exhaust Manifolds
- Exhaust Manifold Gaskets
- Turbo Exhaust Flanges
- SMX Silicone Exhaust Hump Hoses
- Marine Silicone Exhaust 6″ x 8″ Reducing Hump Hose
- SMX Marine Pyro EGT Gauge Kit
- Custom Marine Exhaust Design & Fabrication
- Cummins Marine Fiberglass Exhaust Wrap
- Turbocharger Exhaust Gaskets
- Marine 316L SS 4 inch Pipe (4.5″ OD) 90 Degree Elbow
- Marine 316L Stainless Steel 4 inch Exhaust Pipe (4.5″ OD)
- SMX Custom Dry Exhaust Elbow Kit
- SMX Custom Stainless Steel Exhaust Mixer Kit
- QSM 11 Turbo Exhaust Shield / Wrap
- 90 Degree Exhaust Elbow Wrap (Long Radius)
- Fuel Systems & Filters
- Fuel Filtration Kits
- Fuel Oil & Coolant Filters
- Fuel Coolers
- Fuel Injection Pumps & Parts
- Lift / Priming Pumps
- Fuel Shutoff Solenoids
- Electronic Fuel Control Actuators
- Solid State Fuel Pumps
- Vacuum Gauges
- Squeeze Bulb Priming Kit
- Fuel Fittings
- SMX 501 Filter Head Kit
- SMX 601 Filter Head Kit
- Cummins Marine Injectors
- USCG Approved Fuel Line Hose
- Fuel Injection Lines
- Fuel Return Manifolds
- Fuel Oil Combo Block
- Steering Systems
- Instrumentation & Electrical
- SmartCraft to SMX Upgrade Kit
- SMX Mechanical Engine Digital Display Kit
- SMX J1939 SeaView Digital Display Kit
- SMX J1939 SeaView Double Digital Display Kit
- SMX ED-X Display (QSM11 / 480CE)
- Analog Instrument Panels
- SmartCraft Components
- Sending Units & Sensors
- Alarm Systems & Switches
- Battery Diode Isolators
- QSM11/480CE OEM Instrumentation
- Harnesses
- SMX Turbocator Gauge Kit
- SMX Marine Turbo Boost Gauge Kit
- SMX Marine Pyro EGT Gauge Kit
- VDO & SMX Gauges
- Rudder Angle Indicator Kits
- Switches & Electrical Parts
- SMX Digital Voltage Monitor
- Magnetic Switches
- Connectors & Wiring Repair Kits
- Shift & Throttle Control Systems
- Kobelt Marine Throttle & Shift Controls
- Electronic Throttle Controls (ETC)
- Glendinning Throttle & Shift Control Systems
- Shift & Throttle Control Parts
- Teleflex Xtreme C33 Control Cable
- SMX C33 Control Cable Ball Joint
- SMX Stainless 3300 Clamp & Shim Kit
- Brass Pivot, Morse 33C
- ZF 45-85 A/IV Shift Cable Bracket
- Seaboard Specialty Kits
- EnviroVent Crankcase Ventilation (CCV) Kits
- SMX 6BTA 5.9 Seawater Pump Spacer Kit
- ZF220A & ZF220V Shift Valve Lever Repair Kit
- SMX Custom Exhaust Flange Kit for Cummins Engines
- 6BTA 5.9 Fuel Cooler Removal Kit
- 6CTA 8.3 Cummins Marine Fuel Cooler Removal Kit
- QSB 5.9 Fuel Cooler Removal Kit
- SMX Mechanical Oil Pressure Gauge Kit
- Borg Warner Velvet Drive to Cummins 5.9 HD Adapter Kit
- Freshwater Flush Parts
- Hydraulics / Commercial Marine
- Commercial Marine Hydraulic Pumps & Equipment
- Hydraulic Pumps
- PetroWrap® Anti-Corrosion Tape (2 in. x 33 ft.)
- Marine Wash Down Water Pumps
- SMX 12V Electric Clutch
- PTO Pads & Accessories
- PTO Pulley Kits
- USCG Approved Engine & Gear Hydraulic Hoses
- USCG Approved High Pressure Hydraulic Oil Lines
- Hydraulic Fittings
- Marine Hydraulic Valves
- Hydraulic Tanks
- Hydraulic Filters
- General Boat Parts
- Split Hub Shaft Couplings
- Groco Raw Water Strainers
- Groco Bronze Thru-Hull Valves
- SMX Bronze Freshwater Flush Cap for Groco ARG Series Strainers
- Bronze Tee Adapter and Freshwater Flush System
- Cutlass Bearings
- PSS Dripless Shaft Seals
- Fittings & Extras
- Military Style Top Post Battery Terminals
- Heavy Duty Marine Grade 316L Stainless Steel Washers
- Anchor Flush Mount Hatches
- Shirts, Swag, & Stickers
- Outer Banks Seaboard Marine T Shirt
- Outer Banks Seaboard Marine Sun Shirt
- Cummins Marine 6CTA 8.3 Engine Sticker
- Cummins Marine 6BTA 5.9 Engine Sticker
- Cummins Marine QSB 5.9 Engine Sticker
- Cummins Marine QSB 6.7 Engine Sticker
- Cummins Marine QSC 8.3 Engine Sticker
- Seaboard Marine Sticker
- Cummins Marine Engine Sticker
- Cummins Marine Diamond Performance Series Engine Sticker
- Cummins 330B Diamond Engine Decal
- Cummins 370B Diamond Engine Decal
- Cummins 450C Diamond Engine Decal
- Cummins Chrome Emblem
- Seaboard Marine Hoodie Sweatshirt
- Seaboard Marine Snapback Trucker Hat
- Services
- Used Parts / Classifieds
- Gaskets & O-Rings
- TransmissionsParts & Sales
- ZF Marine Transmissions
- ZF Marine Transmission Sales & Current Inventory
- ZF Marine Transmission Quotation Request
- Transmission Oil Coolers
- ZF Marine Fittings
- ZF Repair & Parts Manuals
- ZF 45-85 A/IV Shift & Troll Cable Bracket
- ZF Shift Levers
- ZF Marine 220A Shift Cable Bracket
- ZF Transmission Breather Caps
- ZF Marine Transmission Dip Sticks
- USCG Approved Engine & Gear Hydraulic Hoses
- ZF Piston Rings
- ZF Marine Transmission Oil Drain Line Kit
- ZF Clutch Kits
- ZF 220A/V Oil Pipe Kit
- ZF Torsional Couplings
- View All Torsional Couplings
- Centa CF-R High Inertia ZF 63-85
- Suredrive™ Coupling for Borg Warner & ZF 220A
- Suredrive™ Coupling for ZF 301 & 302 VLD/IV with Vulkan L
- Cummins Zeus Coupling for Cardan Shaft
- Vulkan Torflex 1000 for ZF 220A
- Centa CF/DS 30 SAE 11.5 & ZF 220A/V
- Centa CF-R for ZF 220A/IV
- Centa CF-R for ZF 285 286 A/IV
- Vulkan Torflex for ZF 280 Series
- Centa CF-R for ZF 280A/IV
- Marine Flex Plate (Velvet Drive, SAE 11.5)
- Vulkan Vulkardan-E (1K4011S020) SAE 14
- Vulkan Vulkardan-E (2K4011S041) SAE 11.5
- Vulkan Vulkardan-E (2K3411S004) SAE No. 11.5
- Vulkan Vulkardan-E (2K3411S020) SAE 14
- ZF Adapter Housings / Plates
- ZF Transmission Adapter Plate SAE#3 for 45A, 63/68A, 63/68IV
- ZF Transmission Adapter Plate SAE#3 for 80A, 85A, 85IV
- ZF Transmission Adapter Plate SAE#4 for 45A, 63/68A, 63/68IV (Volvo D4/D6)
- ZF Transmission Adapter Plate SAE#3 for ZF 220A
- ZF Transmission Adapter Plate SAE#3 ZF 220(PL) & IRM280 (Old Style)
- ZF Transmission Adapter Plate SAE#3 CAT Engine for ZF 220A
- ZF Transmission Adapter Plate SAE#3 for ZF 280A/IV
- ZF Transmission CAT Adapter Plate SAE#3 for ZF 280A/IV
- ZF Transmission Adapter Plate SAE#3 for ZF 285A/IV & ZF 286A/IV
- Transmission Adapter Plate to Bellhousing Bolt Hardware Kit
- SMX Transmission Spacer for Borg Warner Velvet Drive
- Borg Warner Velvet Drive to Cummins 5.9 HD Adapter Kit
- ZF Marine Shift & Trolling Valves
- ZF Marine Mechanical ATF Series Shift & Troll Valve
- ZF Marine Electronic ATF Series Shift & Troll Valve
- ZF Marine Mechanical MB15 Shift Valve
- ZF Marine Mechanical MB30 Shift Valve
- ZF Marine Electric EB15 Shift Valve
- ZF Marine Electric EB30 Shift Valve
- ZF Marine Electric EB15 Shift Valve with Trolling Valve
- ZF Marine Electric Trolling Valve
- ZF Marine Mechanical Trolling Valve (ZF 280+)
- ZF 220/A Marine Mechanical Trolling Valve Kit
- ZF Marine Shift Valve Maintenance Kits
- ZF Marine ATF Shift Valve Gasket
- ZF Marine Shift Solenoids
- ZF Marine Solenoid Coils
- ZF Transmission Filters
- ZF Input / Output Shaft Seals
- ZF Marine 25A, 45A, 63/68A/IV, 80/85A/IV Input Shaft Seal
- ZF Marine 63/68A Output Shaft Seal
- ZF Marine 85A/85IV Input Shaft Seal
- ZF Marine 80A/85A Output Shaft Seal
- ZF Marine 63/68IV Inner (Small) Output Shaft Seal
- ZF Marine 63/68IV Outer (Large) Output Shaft Seal
- ZF Marine 80IV/85IV Inner (Small) Output Shaft Seal
- ZF Marine 80IV/85IV Outer (Large) Output Shaft Seal
- ZF Marine 220A/280A Input Shaft Seal
- ZF Marine 220A/V Output Shaft Seal
- ZF Transmission Mounting Brackets
- ZF Marine Oil Pumps
- Propeller Shaft Couplings
- All ZF Marine Parts
- Remote V-Drive Engine PTO Couplings
- DMT Heavy Duty Marine Transmissions
- ZF Marine Transmissions
- Engine SalesCummins Marine
- Technical InfoCummins Engine Info
- Tony’s TipsKnowledge Base
- Repower ProjectsWhat we Do
- Cummins ForumShare & Ask Questions