SPI CDI Modular Unit for Polaris Snow 1986-1989 Indy 400 Replaces OEM# 3083725

SPI CDI Modular Unit for Polaris

This SPI CDI modular unit replaces OEM part number 3083725 and provides reliable ignition control for Polaris Indy 400 snowmobiles from 1986 to 1989.

Overview

This SPI CDI modular unit is a direct replacement ignition module designed for Polaris snowmobiles, specifically the Indy 400 models from 1986 through 1989. It replaces OEM number 3083725 to restore proper spark timing and engine performance. The unit delivers consistent ignition firing, helping to eliminate hard starting and misfires in older two-stroke engines.

Built For Performance

• Direct replacement for OEM CDI module 3083725
• Solid-state design for reliable ignition timing and dwell
• Encased in durable epoxy potting to resist vibration and moisture
• Plug-and-play installation with factory connectors
• Tested for compatibility with Polaris Indy 400 ignition systems

Fits These Machines

• for Polaris Indy 400 (1986-1989)

On-The-Job Use

• Installed on Polaris snowmobiles for reliable ignition under cold and wet conditions
• Used when original CDI unit fails or produces weak spark
• Common replacement in vintage snowmobile restoration projects
• Helps restore engine starting and smooth idle on two-stroke engines

Specs At A Glance

Good To Know

Q: Will this CDI unit fit a Polaris Indy 400 from 1987? A: Yes, the SPI CDI modular unit is designed for 1986-1989 Polaris Indy 400 models, including the 1987 model year.

Q: Does this CDI module include the wiring harness? A: No, this unit is the CDI module only; it connects directly to the existing harness using the stock connector.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.