Save hundreds in dealer fees – install this genuine Mercury Marine TEMPERATURE SENDER, (19.50 Inch) yourself. Our parts experts provide guidance if needed, and you get OEM quality at discount pricing.

Manufactured to strict Mercury Marine quality standards, this component ensures reliable operation across all engine RPM ranges. Part number 78799 is manufactured to exact Mercury Marine factory specifications for precision installation and optimal performance. Constructed from premium marine-grade materials designed to withstand harsh saltwater and freshwater environments.

Why risk your Mercury engine with questionable aftermarket parts? Genuine part 78799 is built to last, backed by Mercury Marine’s decades of marine engineering expertise and proven reliability.

Compatible Mercury Marine Engines

FITS: 65-300HP MARINER, MERCURY, RACE OUTBOARD

• Fits MARINER, MERCURY, RACE OUTBOARD 65-300HP engines
• Compatible with 7 different HP configurations
• Covers 24 serial number ranges
• Configurations: Jet Drive, Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

65HP Models

• 65HP JET (Mariner): 0D283222-0G760299, 9793577-0P016999
• 65HP JET (Mercury): 0D283222-0G760299, 9793577-0P016999

70HP Models

• 70HP OUTBOARD (Mariner): 0A996142-0B240450, 0B240451-0C221999, 9483121-9506480, 9506481-9589038
• 70HP OUTBOARD (Mercury): 0A996142-0B240450, 0B240451-0C221999, 9483121-9506480, 9506481-9589038

100HP Models

• 100HP OUTBOARD (Mariner): 0A722297-0D283221, 9523034-9793576
• 100HP OUTBOARD (Mercury): 0B209468-0D283221, 9523034-9793576

115HP Models

• 115HP OUTBOARD (Mariner): 0C100000-0D283221, 9559771-9793576
• 115HP OUTBOARD (Mercury): 0C100000-0D283221, 9559771-9793576

225HP Models

• 225HP OUTBOARD (Race Outboard): 0G857000-0T429939

250HP Models

• 250HP OUTBOARD (Mariner)
• 250HP OUTBOARD (Mercury)

300HP Models

• 300HP OUTBOARD (Mercury)

Need help finding your serial number? Check our serial number location guide for step-by-step instructions on locating it on your Mercury engine.

Verification & Support

Want to verify compatibility for part 78799? Use our parts finder tool for instant confirmation. Still have questions? No problem – use the contact buttons at the bottom of this page to reach us by text, call, or email

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