18-7700 Throttle Position Sensor

Model # 13478847 Mfg # 18-7700
3.7 out of 5 Customer Rating
Advice & How-To
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
18-7700 Throttle Position Sensor
Model # 13478847 Mfg # 18-7700
3.7 out of 5 Customer Rating
Advice & How-To
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
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An important part of electronically controlled engines.

A failed throttle position sensor (TPS) can cause an engine to lose power and efficiency. This Sierra TPS was engineered to be compatible with GM Big Block V8 based marine engines. All Sierra parts are engineered to meet or exceed manufacturer’s specifications to ensure an OEM fit a

Key Features

  • Engineered to meet or exceed MerCruiser and Volvo Penta specifications
  • Compatible with GM Big Block basedmarine engines that use an ECM 555
  • Backed by SeaStar Solutions Limited Two-Year Warranty

18-7700 Application Guide

Application OEM Part Number
Mallory 9-33702
Mercruiser Stern Drive 853678T, 8M0097035, 853678, 802623
Volvo Penta 3857487

The Sierra Engine Parts Selector

In addition to throttle position sensors, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see our Engine Parts Selector, where you can search by engine make, serial number and model or year of manufacture.

Sierra Limited Lifetime Warranty

Type Engine Systems Parts

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