Installation Manual

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MSD DynaForce Starter

FORD 289, 302, 351W

3/4" Depth, PN 5090, 3/8" Depth, PN 50901

Parts Included:

1 - Starter 1 - Shim Ring 1 - Outer Shim

WARNING: Before installing the DynaForce Starter disconnect the battery cables. When disconnecting

the battery cables, always remove the Negative (-) cable ﬁrst and install it last.

IMPORTANT: Proper installation of the DynaForce Starter is important to the overall operation. Correct alignment

of the starter pinion with the ring gear is needed to achieve the best operation and longevity from

your starter. Please read the instructions before attempting the installation.

When selecting a starter for your Ford, our research has found that year, model and drivetrain

combination do not always dictate the correct starter. There are variations between the 164 tooth and

157 tooth ﬂywheels and well as the inside diameter of the starter block plate (4.130” or 4.084”). MSD

offers two starters for the 289/302 and 351W engines; one with a 3/8th depth ring gear, one with a

¾” depth. Figure 1 shows the differences and applications.

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.

When using OEM bell housings, it must be paired with the corresponding ﬂywheel and ring gear.

Many aftermarket bellhousings feature a punch out to allow both to be used.

ENGINE BLOCK PLATE

TRANSMISSION

USE

PN 5090

USE

PN 50901

3/4”

3/8”

RING GEAR TEETH TRANSMISSION STARTER REGISTRY DIAMETER DEPTH STARTER

164 4-speed 4.130" 3/8" PN 50901

164 Automatic 4.084" 3/4" PN 5090

157 4-speed and Auto 4.084" 3/4" PN 5090

Note that these are generally the applications, however there are variables.

Figure 1 Ring Gear Depth and Bell Housing/Engine Block Identiﬁcation.

Summary of content (4 pages)

PAGE 1
MSD DynaForce Starter FORD 289, 302, 351W 3/4" Depth, PN 5090, 3/8" Depth, PN 50901 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.
PAGE 2
INSTALLATION INSTRUCTIONS INSTALLATION CLOCKING LOCATIONS 1. Make sure the starter mounting flange on the mid plate is clean and smooth. 2. Before mounting the starter, measure the distance from the front of the ring gear (engine side) to the starter mounting surface (Figure 2). • If there is not enough clearance, you will need to install the supplied shim kit by removing the mounting block (Figure 3). Place the small shim ring in the bearing bore and install the outer shim on the support housing.
PAGE 3
INSTALLATION INSTRUCTIONS 3 12-GAUGE MINIMUM TO IGNITION SWITCH CABLE LENGTH VS. GAUGE LENGTH 3’ 5’ 7’ 10’ +10’ AWG 4 2 1 0 00 + BATTERY Figure 4 Wiring the Starter. FACTORY REMOTE SOLENOID TO IGNITION SWITCH 10-12 GAUGE + BATTERY Figure 5 Wiring to Incorporate Factory Solenoid. INSTALLATION INFO INSPECT PINION GEAR After cranking the engine several times, you can inspect the witness pattern on the pinion gear. The pattern should show 1/4" to 3/8".
PAGE 4
DISCONNECT SWITCHES Most sanctioning bodies require an emergency disconnect switch. Be sure to use a heavy duty switch that is capable of handling high current. Some starters may pull over 700 amps while cranking. Most disconnect switches are rated at continuous and intermittent amps. Make sure to use a switch that exceeds your starting and electrical system requirements.