Return to Website

Wizard Outboard Motor Forum

Welcome to the new Wizard Outboard Forum.

Wizard Outboard Motor Forum
Start a New Topic 
WF-4 Flywheel nut torque

Does anyone have the proper flywheel nut torque for a WF-4?

I found some information in this forum from 2008, where jp was talking about a WG-4, and wrote the following: "-- Flywheel torque is 40-45 foot pounds." Maybe it is the same for a WF-4?

Re: WF-4 Flywheel nut torque

WG4 and WF4 are similar if not the same powerhead AND they use same F 189 magneto & flywheel
Mercury Mark 7 uses a similar but different Phelon ignition/flywheel with torque specc
of 40#

Remove all trace of grease, oil and grime from tapers in flywheel hub and on crankshaft.
Torque to factory spec...too little may allow flywheel to work tight may
split the flywheel hub.

If tapers are rough or rusted it may be possible to use valve grinding paste to lap the tapers to match. Some would say lap any flywheel not original to the crankshaft.

Main thing to keep in mind is the taper does the work of holding flywheel and crankshaft together. Key and keyway are there to locate not hold. Correct torque
and dry clean taper create the lockup.

Simple things are not difficult to do the right way , but, often are done the wrong way or not at all.