73 9.5 evinrude. Need tips for getting fly wheel off..

[mettyfish]

Darn thing is giving me fits. I even went and bought the right fly wheel puller but now I can hold the fly wheel still to tighten the gear puller enough. I have a strap wrench but not quite long enough to reach around the whole fly wheel. Oh and once I get it off if I get it off, how much torque on the fly wheel nut when I put it back on. I having to do all this to check the kill switch wiring. Where do the kill switch wires hook to under fly wheel? Thanks again for all you guys do for me. Metty

 

[bktheking]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

40-45 ft lbs. You could make a strap wrench with a piece of wood an a serpentine belt from a car or buy a bigger wrench.

 

[Texasmark]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

Harbor Freight has good 1/2" drive torque wrenches for less than $100. The red and black one sells for about $70 and works great....have had one for half a dozen years.....just put a little air tool oil in the air inlet periodically...oil available at auto parts stores. Run it at around 100 +/_ 20 psig.

Amazing critter when it comes to things like taking flywheel nuts off, and alternator nuts (on cars) off. Makes quick work of rotating your tires. Would do the toolbox good to have one and since I owned my first I absolutely will not be without it. You don't even have to hold onto the flywheel. The impact is so fast that it delivers it's blow and prepares for the next one before the flywheel has had time to react.

Prior to putting the flywheel back on, I would take some emery cloth or 400 grit sandpaper and polish the two mating surfaces. Then a squirt of light oil (WD-40).

On putting the nut back on, on that engine and with my 1/2" drive, I would run the nut down tight, let the hammer whack it till the nut just stops turning and quit which should translate to about 50 ft-lbs.

Be sure the Woodruff key is in perfect shape and properly seated when you go back together. That guy can give you fits if it is not installed as designed (no damage to the key and tight fitting) and causes your timing to be off by a few degrees as a result.

Mark

 

[bktheking]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

Mark, I was always told it's a big no no to use a torque wrench for removing bolts, the reverse is for left hand thread not to remove nuts and bolts?????

 

[tx1961whaler]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

---and don't oil the tapered shaft. Clean and dry.

 

[mettyfish]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

Can I do the rope trick I have read about in order to hold the flywheel still? Thanks.

 

[tashasdaddy]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

"Then a squirt of light oil (WD-40)." NO,NO!!!! clean and dry. it is a friction connection.

 

[bktheking]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

"Then a squirt of light oil (WD-40)." NO,NO!!!! clean and dry. it is a friction connection.

The only oil i'd say is the oil the oiling wick.

 

[rjezuit]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

And do not use the impact and guess at the torque when putting it back on. Use a torque wrench and be sure.

 

[wilde1j]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

Can I do the rope trick I have read about in order to hold the flywheel still? Thanks.

You talking about the idiotic idea of stuffing rope thru one of the spark plugs holes? Not on any of my motors! You can buy a flywheel holder on Ebay for under $20 including shipping.

 

[72_25hp_Seahorse]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

Metty,
I believe the kill switch wires go to the points. Someone (can't remember who) posted a picture of the mag plate with the wires and points. Try searching for it.
BKtheking and TashasDaddy know their stuff. Take their advice about NO oil on the taper and using a torque wrench (not an air powered impact wrench) on assembly. You can hold the flywheel with the strapwrench while torqueing the nut.

 

[Texasmark]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

Mark, I was always told it's a big no no to use a torque wrench for removing bolts, the reverse is for left hand thread not to remove nuts and bolts?????

Been using one for 40 years on cars, boats, motorcycles, tractors and farm machinery (try getting the nut off a 7/8" bolt on a 40 year old plow with a breakover bar!!!!). Never, Never lost a bolt/nut, but I have "busted" head bolts off trying to get them out with a socket and 1/2 " breakover bar,with no extension on it, before I could afford an air compressor and an impact wrench.

Also, as I said, when you have a nut on something that you can't get a hold of, nothing (for me) beats an impact. I will say, that there are settings on the wrench like from 1 easiest to 5 hardest impact and you have to pay attention to what size the nut/bolt is before you start hammering as if you get on it too hard you could break it off.....I guess. I use a 1/2" drive and it provides all the power I need. A 3/4" drive can raise cain with things if you aren't careful especially in the hands of the inexperienced at tire dealerships.

Friction fit or not, I always put a little lube on flywheel threads (to insure I get the full friction fit and don't get hungup on something else. and wheel threads and have never had a problem.

It's sort of analogous to reading torque specs for bolts. A really good chart will list different torque values for a certain sized, grade of bolt depending upon the friction of the interface. Obviously you want the torque on the bolt, not be reduced by twisting friction detracting from the actual torque. To each his own.

Mark

 

[theflash4893]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

If your still trying to figure out how to hold the flywheel still, here is what I did with my 73 9.5 and it worked fine.

 

[mettyfish]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

Hey thanks for that pic. I will remember that for future. But I did finally get it off. I might need you to help me with my stop switch problem though. Look for that post on same engine. Thanks so much. Mettyfish

 

[72_25hp_Seahorse]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

I think there may be some confusion on what 2 VERY different tools may be called. If you're new to "special" tools knowing the difference is VERY important.
An Impact wrench usually kind of looks like a gun (pistol) that is stereotypically used for removing and installing tires/wheels. Normally air powered but are available in electric models, theydo come in different drive sizes. 1/4, 3/8, 1/2 inch are the "normal" sizes but they do come bigger for use on heavy equipment. Using a 3/4 inch impact to install automotive lugs is crazy stuff. You may as well give the customer new brake rotors right away, you will distort them.They do work very well for removing nuts and bolts, especially, as Mark says, on things that may be difficult to hold still(Flywheels?).

A torque wrench is a precision piece of equipment. They come in different styles. Click type, beam, electronic are some. They also come in different drive sizes and torque ranges. You use the torque wrench to tighten the fastener to a specified "tightness".

One of the fastest way to ruin a torque wrenches calibration is to remove tight fasteners with it. You usually go way over the limit of the wrench.

Google both "impact wrench" and "torque wrench". You will see the diff.

If ever in doubt always use a torque wrench on assembly. It does not take that much extra time and it may save you headaches and money later.

 

[bktheking]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

One of the fastest way to ruin a torque wrenches calibration is to remove tight fasteners with it. You usually go way over the limit of the wrench.

Kinda why I said using a torque wrench to remove bolts is a no-no, it can instantly mess up the calibration, the reverse is for left hand thread torque. I usually use my impact or breaker bar to do the hard work.

 

[Texasmark]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

I usually use my impact or breaker bar to do the hard work.

I can't tell you the difference it made in my mechanicing abilities when I graduated from the breaker bar to the impact. It was absolutely night and day and I couldn't believe I did without it for so long. Today, I seldom if ever use the breaker.

Totally agree on usage of the torque wrench for torqing only and only within the specified limit of the bar. I have both the dial and the snap action and on which I like better, I don't have to have my eye over the dial with the snap action which in some instances is difficult to achieve....tight working environments.

Mark

 

[bktheking]

Re: 73 9.5 evinrude. Need tips for getting fly wheel off..

The confusion comes from your first reply

"Harbor Freight has good 1/2" drive torque wrenches for less than $100. The red and black one sells for about $70 and works great....have had one for half a dozen years.....just put a little air tool oil in the air inlet periodically...oil available at auto parts stores. Run it at around 100 +/_ 20 psig."

I think you meant to say impact gun instead of torque wrench, air tool oil in the inlet of the torque wrench??? LOL no worries, now that I have re read the post.