3083045 Crankshaft Crank Oil Seal Kit for Polaris Indy Sport 340 1987-1990

Crankshaft / Crank Oil Seal Kit for Polaris Indy Sport 340

This crankshaft oil seal kit replaces the worn crank seals on your Polaris Indy Sport 340, restoring the airtight crankcase seal these two-stroke engines need to run right, and it cross-references OEM part number 3083045.

Overview

This crankshaft oil seal kit is built to reseal the crank ends on the Polaris Indy Sport 340 snowmobile, stopping air leaks that cause lean running, hard starting, and erratic idle. Each seal in this crank oil seal kit is sized to match the 340 engine's crank journals so a rebuild can be completed without hunting down individual pieces. It is aimed at home mechanics and shop techs doing a top or bottom end refresh on a classic Polaris Indy Sport 340.

Built For Performance

• Direct replacement for OEM part number 3083045
• Seals the crankshaft ends to keep crankcase pressure stable
• Prevents air leaks that cause lean conditions and erratic idle
• Resists fuel, oil, and heat exposure inside the crankcase
• Sold as a kit covering the crank seal positions for the 340 engine
• Simple install during a bottom end or full engine rebuild

Fits These Machines

• for Polaris Indy Sport 340, 1987
• for Polaris Indy Sport 340, 1988
• for Polaris Indy Sport 340, 1989
• for Polaris Indy Sport 340, 1990

On-The-Job Use

• Crankcase reseal during a two-stroke bottom end rebuild
• Fixing lean-running and hard-starting symptoms on a vintage Indy Sport 340
• Routine seal replacement while the engine is out for service
• Restoring a stored or non-running 340 snowmobile to trail use

Specs At A Glance

Good To Know

Q: How do I know my Indy Sport 340 needs crank seals? A: Common signs include hard starting, a runaway idle, oil leaking behind the clutch, or a lean condition that will not tune out. A crankcase pressure test confirms whether the seals are leaking.

Q: Can I install this kit without splitting the cases? A: In many cases crank seals can be replaced with the engine in the chassis, though rust or damaged seal bores may require case removal. Check your service manual for the correct procedure on the 340 engine.

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