Msd 8677 Adjustable RPM Module Installation User Manual download pdf

Adjustable Low RPM Module

PN 8677

This Adjustable Low RPM Module is designed to be used with any of the MSD Rev Control components

or accessories that use the standard white MSD RPM Modules. It cannot be used on the MSD Engine

Governor, PN 8725.

Note: Solid core spark plug wires cannot be used with an MSD Ignition Control or MSD Timing and

RPM Accessories.

OPERATION

The Adjustable Module has a screw in its side that controls the rpm amount. The range of limit is from

about 1,000 – 3,000 rpm, depending on the application. One turn is roughly equal to 100 rpm. The

Module is set at the factory with the adjusting screw turned all the way in which is the highest rpm.

Parts Included:

1 – Adjustable Low RPM Module 1 – Small Screw Driver

Note: The adjusting screw is a multi-turn

pot. This means that it will still

turn even when the minimum or

maximum rpm is reached.

The best way to set the desired rpm is

with an MSD Ignition Tester, PN 8998.

The Tester will simulate the ignition

running so the Module can be set

without running the engine. If a Tester

is not available, run the engine and set

the rpm using a tachometer.

WARNING: High voltage is present on the coil terminals. Do not touch the coil terminals

when the engine is cranking or running.

ONE TURN = APPROXIMATELY 100 RPM

CW = INCREASE RPM LIMIT

CCW = DECREASE RPM LIMIT

M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4

ONLINE PRODUCT REGISTRATION: Register your MSD product online and you’ll be entered

in our monthly 8.5mm Super Conductor Spark Plug Wire give-away! Registering your product

will help if there is ever a warranty issue with your product and helps the MSD R&D team create

new products that you ask for! Go to www.msdperformance.com/registration.

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Summary of Contents

Page 1 - Adjustable Low RPM Module

Adjustable Low RPM ModulePN 8677This Adjustable Low RPM Module is designed to be used with any of the MSD Rev Control components or accessories that u

Page 2 - TECH NOTES

Limited Warranty MSD warrants this product to be free from defects in material and workmanship under its intended normal use*, when properly installe

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Msd 8677 Adjustable RPM Module Installation User Manual

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