Sierra 18-9897

Removing a stubborn flywheel from your Mercury outboard motor can turn a simple maintenance job into a frustrating ordeal. That's where the Sierra 18-9897 flywheel puller steps in as your reliable partner. Designed specifically as a direct replacement for Mercury OEM part 91-895343T02, this heavy-duty tool grips securely and applies even pressure to separate the flywheel without damaging threads or surrounding components. Boat owners and mechanics alike swear by its precision engineering, which prevents common pitfalls like stripped bolts or warped pulleys during disassembly.

Why This Flywheel Puller Stands Out for Mercury Outboards

Crafted from high-strength steel with a corrosion-resistant finish, the Sierra 18-9897 withstands the harsh marine environment, from saltwater spray to workshop grime. Unlike generic pullers that slip or bend under torque, this one features a three-leg design that distributes force evenly across the flywheel's outer edge. It's the go-to solution for servicing popular Mercury models, helping you access the crankshaft for impeller replacements, timing adjustments, or full engine rebuilds. Save hours of downtime and avoid calling in expensive service techs—keep your boat running smoothly with a tool built to last through seasons of heavy use.

Perfect Fit for Your Engine Setup

• Compatible with a wide range of Mercury 2-stroke and 4-stroke outboards, including popular 75-150 HP models from the 1990s through early 2000s.
• Matches OEM specifications for bolt patterns and thread sizes, ensuring no modifications needed.
• Ideal for DIY enthusiasts tackling stator repairs, flywheel magnets, or trigger assembly work.

Whether you're refreshing an older workhorse engine or prepping for the fishing season, this puller fits seamlessly into your toolkit. Pro tip: Pair it with penetrating oil applied overnight for those flywheels seized by years of carbon buildup and heat cycles.

Step-by-Step Guide to Using Your Sierra Flywheel Puller

1. Safely secure the outboard on a stable stand and disconnect the battery to prevent accidental starts.
2. Remove the flywheel cover, ignition wires, and any retaining nuts using the correct socket sizes.
3. Position the puller's legs into the flywheel notches and thread the center bolt firmly into the crankshaft end.
4. Turn the bolt clockwise with a breaker bar, applying steady, incremental pressure—never rush to avoid thread damage.
5. Once free, inspect the flywheel keyway and crankshaft taper for wear before reinstallation.

This straightforward process typically takes under 30 minutes for experienced users, empowering you to handle repairs confidently at the dock or in your garage.

Boosting Longevity and Performance

Beyond removal, regular flywheel service prevents electrical glitches like weak sparks or erratic timing, which plague neglected outboards. The Sierra 18-9897 not only gets the job done but also encourages proactive maintenance. Clean and lubricate the tool after each use to maintain its bite, and store it in a dry spot to fend off rust. Marine pros recommend marking torque specs on a cheat sheet for reinstallation—around 40-50 ft-lbs for most Mercury flywheel nuts, but always verify against your service manual.

Frequently Asked Questions