Removal of flywheel on 1967 40hp lark 9.

[elkandbison]

HELP! i have removed the nut that holds the flywheel on. I put a puller on the flywheel and it still will not come off . Can some one give me some direction?

 

[jonesg]

Re: Removal of flywheel on 1967 40hp lark 9.

You need hardened bolts in the puller or you'll strip them.
Put some torque to it and whack the center bolt, leave it for a while and repeat, sometimes they take a while.

 

[wickware]

Re: Removal of flywheel on 1967 40hp lark 9.

jonesg?s method works good! We just fought one that we thought w/n come off. BUT! We loaded a good puller (no bending or giving due to ...) and hardened bolts (grade 5 or 8) with good torque, added plenty penetrating oil (WD-40, PB, ...), popped the puller with some good blows with a med hammer and walked away. Cover the flywheel to keep it from coming and causing danger. Do not run your bolts past the thickness of the flywheel and ruin your coils or .... Add more torque and blows with the hammer later if needed. No Name Calling!!

Good Luck,
JOW

 

[outlaw241]

Re: Removal of flywheel on 1967 40hp lark 9.

if you have a autozone in the area you can rent a harmonic balance r puller for FREE. they have several tools they rent to you at no cost just a deposit so you will return them.

 

[Cofe]

Re: Removal of flywheel on 1967 40hp lark 9.

Loosen the center flywheel nut, spray penetrant on the crank/ flywheel then finger tighten the nut back on and loosen it one and a half turns.(leaving the flywheel nut on will keep the flywheel from jumping anywhere when it comes loose.)
Place the harmonic balancer puller into position, and install the 3 grade 8 bolts and washers (make sure that they thread well into the flywheel, but not too far as they could damage ignition components.)
Tighten the center bolt of the puller while holding the puller, (use the pipe wrench to hold a leg on the puller if needed.) Get the puller good and tight. It should pop and be loose.
If it didn?t come loose, ?rap? the center puller bolt on the top with a 2lb hammer. If it still doesn?t pop, tighten the puller some more, then ?rap? the puller bolt again. Keep repeating until it pops. (hammer hits are rated-- Tap, Rap, Light swing, Heavy swing)
Some people just let it set overnight under tension and it is loose in the morning. I have used a hair dryer to gently heat up an aluminum flywheel under tension and that worked.
If your flywheel has been extremely difficult to remove, make sure you inspect the underside of the flywheel, and check you?re ignition components for rub damage. This is an indication that the flywheel was over torqued and caused the flywheel to contact the ignition components. In this case replace the flywheel.

Reassembly?..Tools: Torque wrench and a strap wrench.
Use a torque wrench and the proper torque rateing in the OEM manual. Many people on this forum can help find the proper torque for you. Use the strap wrench to hold the flywheel. Some torques are in inch pounds and others are foot pounds ect. Here is a easy online torque converter. http://www.pitt.edu/~rsup/touqueconv.html

You can make a strap wrench from an old belt and a piece of wood. Secure the belt close to the buckle onto the wood with screws.

 

[Intermediate Mariner]

Re: Removal of flywheel on 1967 40hp lark 9.

I had the same problem but since I had the powerhead off I was able to turn it upside down. I beat the heck of it with one of those orange dead-blow mallets and it finally came off... and there WAS corrosion on the tapered shaft. I steel wooled them for replacement.

If your powerhead is still on the motor I would try the same thing and rotate the flywheel after each blow and hit it from underneath. You could also try raising your motor which would allow for a better swing angle.

Also I have not been able to find an answer on this but on some of those years the ring gear is identical on both sides which possibly may allow you to flip it over before install on the flywheel if you get stuck and end up using a metal hammer and ding it up (plus you get new flywheel teeth).

You can always get 'em running!
"Hey where did you get that old outboard?". "It was buried in my back yard!"