CDI Electronics XT-SF-170-IR XT Series Alternator, 170A 12V, Single Foot Mount for Volvo Penta, Mercruiser, Pleasurecraft, Crusader, Indmar

The CDI Electronics XT-SF-170-IR is an XT Series Alternator built for marine engines that demand strong charging output in a compact case. It is designed for use with Volvo Penta (Gas & Diesel), Mercruiser, Pleasurecraft, Crusader, and Indmar engines. Rated at 170 amps with up to 110 amps of output at idle speeds, it is well suited to vessels running higher electrical loads such as electronics, refrigeration, and accessory systems that need steady charging even when the engine is not at cruising RPM.

This alternator uses a single foot (SF) mount, 1-2 inch, paired with a K6 serpentine pulley, and runs on an internal voltage regulator (IR) for simplified wiring compared to externally regulated units. Dual fan cooling and a high-airflow frame help the unit shed heat during sustained duty cycles, while custom high-speed bearings are built in for long service life. The XT-SF-170-IR is made in the USA.

Specifications

• Brand: CDI Electronics
• Manufacturer Part Number: XT-SF-170-IR
• Amperage: 170 amps
• Voltage: 12 volts
• Idle Output: Up to 110 amps at idle speeds
• Regulator Type: Internal regulator
• Mounting Type: Single foot (SF), 1-2 inch
• Pulley Type: K6 serpentine pulley
• Cooling: Dual fan cooling, high airflow frame
• Bearings: Custom high speed bearings
• Material: Plastic
• Country of Origin: Made in the USA
• Item Dimensions (L x W x H): 10.24 x 9.45 x 9.06 inches
• Package Dimensions (L x W x H): 10 x 7.99 x 7.99 inches
• Weight: 20 pounds
• UPC: 676205501996
• Engine Compatibility: Volvo Penta (Gas & Diesel), Mercruiser, Pleasurecraft, Crusader, Indmar

Fitment

• Volvo Penta (Gas & Diesel)
• Mercruiser
• Pleasurecraft
• Crusader
• Indmar

Frequently Asked Questions

What engines is the CDI XT-SF-170-IR alternator designed for? The CDI Electronics XT-SF-170-IR is designed for use with Volvo Penta (Gas & Diesel), Mercruiser, Pleasurecraft, Crusader, and Indmar engines.

How many amps does the XT-SF-170-IR alternator produce? 170 amps is the rated output of the XT-SF-170-IR, with up to 110 amps available at idle speeds, making it suited to vessels with higher electrical loads.

Is the XT-SF-170-IR a 12 volt alternator? Yes, the CDI Electronics XT-SF-170-IR is a 12 volt alternator.

What type of mount does the XT-SF-170-IR use? A single foot (SF) mount, 1-2 inch, is used on the XT-SF-170-IR alternator.

Does the XT-SF-170-IR have an internal or external voltage regulator? Internal regulator (IR) is built into the XT-SF-170-IR, which simplifies wiring compared to an externally regulated unit.

What pulley comes installed on the CDI XT-SF-170-IR? A K6 serpentine pulley is fitted to the XT-SF-170-IR alternator.

What is the difference between the XT-SF-170-IR and the XT-VT-170-IR? The XT-SF-170-IR uses a single foot (SF) mount with a K6 serpentine pulley for Volvo Penta, Mercruiser, Pleasurecraft, Crusader, and Indmar engines, while the XT-VT-170-IR is built with a Vortec mount, K6 serpentine pulley, and case ground for GM Block (Chevy) 5.0L, 5.7L, and 6.2L engines. Confirm the mount type before ordering, since the two are not interchangeable.

What are the dimensions of the XT-SF-170-IR alternator? The XT-SF-170-IR measures 10.24 x 9.45 x 9.06 inches (L x W x H).

How much does the XT-SF-170-IR alternator weigh? 20 pounds is the weight of the CDI Electronics XT-SF-170-IR alternator.

Where is the XT-SF-170-IR alternator manufactured? The XT-SF-170-IR alternator is made in the USA.

What cooling system does the XT-SF-170-IR use? Dual fan cooling with a high-airflow frame is used on the XT-SF-170-IR to manage heat during sustained duty cycles.

Is the CDI XT-SF-170-IR a genuine CDI Electronics part? Yes, the XT-SF-170-IR is a CDI Electronics XT Series Alternator, purpose-built for Volvo Penta, Mercruiser, Pleasurecraft, Crusader, and Indmar engines.