837473 Thermo Monitor | Genuine Volvo Penta Part

🔧 Product Description

It weighs 0.043 kg, is listed for 15 applications across the MD, TMD, TD, D and TAMD series, and supersedes part number 836717, which was catalogued earlier as a thermostat. Volvo Penta lists this part for engines from build number 7700 onward.

🚤 Compatibility

Typically suits:

• Volvo Penta MD100B
• Volvo Penta TMD100A
• Volvo Penta TMD70C
• Volvo Penta TD120A
• Volvo Penta TD100A
• Volvo Penta MD70B
• Volvo Penta D120A
• Volvo Penta D100B
• Volvo Penta MD120A
• Volvo Penta TAMD120A
• Volvo Penta TAMD120B
• Volvo Penta TMD120A
• Volvo Penta D70B
• Volvo Penta MD100B-CC
• Volvo Penta MD70C

• Engine Family: MD, TMD, TD, D, TAMD
• Serial Range: MO-XXXX/7699., Closing at 96°C.

⚙️ Key Features

• Closes at 96 °C
• 0.043 kg
• Supersedes 836717, previously listed as a thermostat
• 15 applications across the MD, TMD, TD, D and TAMD series
• Fitted from build number 7700 onward

🔌 Function

Closes its contacts once coolant temperature reaches 96 °C, so the alarm or warning circuit is triggered when the engine runs too hot.

⚠️ Common Signs of Failure

• Overheat alarm never sounding even when the engine is visibly hot
• Alarm sounding constantly at normal running temperature
• Corroded or green terminal at the switch
• Coolant weeping from the switch thread
• Intermittent alarm that comes and goes with vibration

🛠️ Service Notes

• This is a temperature switch that makes at 96 °C, while the number it replaces was catalogued as a thermostat, so confirm whether the engine needs the switch or the flow control thermostat before ordering
• Because this feeds the overheat warning, test the alarm circuit after fitting rather than assuming it works
• Renew the sealing washer and do not use sealant on the sensing thread

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 837473 → Supersedes 836717

OEM / Related Numbers

• 836717 earlier number superseded by this part

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging