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Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T

Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T is a direct-fit replacement sensor with a 3/8"-18 NPT thread, priced at $13.57. It reads up to 240°F and is ideal for monitoring engine coolant temperature in Mercruiser marine engines, ensuring reliable overheat detection.

$13.57

● In stock

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Price and availability may change. Click to see current details on Lab Work Auto.

Key features

  • Direct fit for Sierra 806490T and Mercruiser 806490T
  • 3/8"-18 NPT thread for secure engine mounting
  • 10-32 stud terminal for stable gauge connection
  • Measures up to 240°F for overheat detection
  • Single station output for one-gauge systems
  • Brass body resists marine corrosion
  • OEM-spec design for plug-and-play install

Pros

  • +Exact replacement for popular marine engines
  • +Affordable at $13.57 with reliable performance
  • +Corrosion-resistant brass construction
  • +Simple installation with no calibration needed
  • +Backed by 30-day return policy if unused
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Cons

  • Single station only, not for dual-gauge setups
  • No temperature calibration data provided
  • Limited to compatible Mercruiser applications

About Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T

What is Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T?

The Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T is a precision-engineered replacement sensor designed for marine engine applications. Built to match OEM specifications, this sender delivers accurate coolant temperature readings to a single gauge, helping prevent engine overheating in boats powered by Mercruiser engines. Priced at just $13.57, it offers a cost-effective, reliable solution for maintaining engine health without requiring modifications or calibration.

Key features

  • Direct Fit Replacement — Compatible with Sierra 806490T and Mercruiser 806490T models for seamless installation.
  • 3/8"-18 NPT Thread — Ensures secure, leak-free mounting into the engine block.
  • 10-32 Stud Terminal — Provides a stable electrical connection to the temperature gauge.
  • Up to 240°F Range — Accurately detects high temperatures to prevent engine damage.
  • Single Station Output — Designed for use with one-gauge monitoring systems.
  • Brass Body Construction — Resists corrosion in harsh marine environments.
  • OEM-Spec Design — Installs easily without programming or adjustments.

Who is Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T for?

This temperature sender is ideal for boat owners and marine technicians maintaining Mercruiser-powered vessels. It suits DIY mechanics and professionals seeking an affordable, reliable replacement that performs like the original. It's especially useful during routine maintenance, engine upgrades, or when replacing a failed sensor.

How does Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T compare?

Compared to generic or universal temperature sensors, the Labwork sender offers exact fitment and consistent signal output for Mercruiser systems. While some aftermarket options may require adapters or calibration, this unit installs directly and reads accurately out of the box. It undercuts OEM prices while maintaining brass construction and marine-grade durability, making it a smarter choice than plastic-bodied or non-OEM spec alternatives.

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Best use cases

  • Replace failed coolant temp sender on Mercruiser
  • Upgrade from generic sensor to OEM-spec part
  • Install during marine engine maintenance
  • Prevent overheating in boat engine systems
  • DIY repair for Sierra 806490T-compatible models
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Is Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T right for you?

This sender is best for boat owners with Mercruiser engines needing a reliable, low-cost replacement. Ideal for DIYers with basic tools and mechanical knowledge. Not suitable for dual-gauge systems. Consider universal senders only if fitment specs match exactly. Always verify thread size and terminal type before purchase.

How it compares: Compared to universal temperature senders, this Labwork model offers exact OEM fit and reliable signal accuracy without adapters. It outperforms plastic-bodied sensors in durability and is more affordable than dealer-sourced OEM parts while maintaining brass construction and marine resistance.

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Frequently Asked Questions

What does the Labwork Temperature Sender 806490T do?

It monitors engine coolant temperature in Mercruiser marine engines and sends readings to a single gauge, helping prevent overheating with accurate 240°F detection and reliable brass-body performance.

Does this sender fit Sierra 806490T applications?

Yes, it is a direct-fit replacement for both Sierra 806490T and Mercruiser 806490T models, ensuring proper thread, terminal, and signal compatibility without modifications.

How do you install the Labwork Temperature Sender?

Install by threading the 3/8"-18 NPT unit into the engine block and connecting the 10-32 stud to the gauge wire. No calibration is needed—just torque to spec and reconnect the wiring.

Is the Labwork sender made of brass?

Yes, it features a brass body construction that resists corrosion in marine environments, offering better durability than plastic or zinc-alloy alternatives.

Can this sender work with dual temperature gauges?

No, it is a single station sender designed for one-gauge systems only. For dual-gauge setups, a dual-output sender with compatible specifications is required.

How much does Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T cost?

Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T is $13.57 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.

Is Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T in stock at Lab Work Auto?

Yes, Labwork Temperature Sender Single Station Sierra For Mercruiser 806490T is currently in stock at Lab Work Auto.

Specifications

SKU
F7-3832
Last updated May 14, 2026