OMC Flywheel

[Jbors]

I have a 1985 OMC 1.6 litre SeaDrive Outboard. The engine Model # is 2BBXCO and the OEM p/n on nthe Flywheel is 582320. The other day I was running along and the thing lost power. I went through all the normal checks and when I pulled the flywheel the center magnet had come loose. From reading your forum I have read that these can be replaced and repaired, but I don't know how to realign the magnet. Is there a kit you can buy that has the info or does someone out have the knowledge on how this is done. the magnet is still in good shape and is already cleaned and so is the flywheel. I would appreciate any HELP. Thanks.

 

[marinemech1]

Re: OMC Flywheel

unless your flywheel has an alginment mark you have no way of knowing how to position magnet<br />therefore you need a flywheel

 

[Dhadley]

Re: OMC Flywheel

Welcome Jbors!!<br /><br />There are some folks who have the "map" and can realign them. If you cannot find a replacement let us know and we'll put you in touch with them. A V4 crossflow flywheel shouldn't be that hard to find.

 

[Joe Reeves]

Re: OMC Flywheel

Jbors.... If that flywheel is a crossflow 35amp type, and If you cannot locate one here on "iboats", I have one for sale on eBay at: http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc <br /><br />However, please check the "iboats" site out first.

 

[kameika]

Re: OMC Flywheel

Wait! I had exactly the same problem last year with my 2.7L (1987) Sea Drive.<br /><br />Some goon actually tried to sell me a new flywheel for $800. EIGHT HUNDRED dollars. Do you believe that? <br /><br />That is ABUSIVE.<br /><br />Here's the skinny. I know you'll thank me:<br /><br />The magnets on the outer section of the housing do not matter, in terms of position. The magnets in the hub of the flywheel housing DO matter. The hub magnet position holds the engine timing. The magnets on the outside are for the alternator.<br /><br />I was able to purchase a "Flywheel rebuild kit." Cost? $7 per magnet. I believe there were SIX in total. Each kit contains: a magnet. Epoxy packet. A "popsicle stick" (tongue depressor).<br /><br />each magnet has a small "dent" on a corner. This is to indicate polarity.<br /><br />I recommend replacement of all six. Don't replace one only.<br /><br />Remove all exterior wall magnets. Put them on your basement refrigerator. <br />Notice how well it removes paint from the refrigerator door. <br />You will not use them again.<br /><br />Clean the flywheel with acetone. Be thorough.<br /><br />One new magnet at a time, mix the epoxy, liberally spread the grey (included) epoxy to the back of the magnet. Apply to the very nicely cleaned wall of the flywheel housing.<br /><br />Use the tongue depressor as a "spacer." between each magnet. I believe the spacing is either 3/8 or 5/8 of an inch.<br /><br />You'll need to wait for partial curing between addition of magnets.<br /><br />The bad news:<br /><br />If you lost a magnet, you may have damaged your stator. I did. This is a little expensive. After market: $130. OMC (OEM) = $320.<br /><br />Tell me if this helps. It's long winded, but I don't wish to see you "taken for a ride."<br /><br />Ken.<br />Red Bank, NJ

 

[kameika]

Re: OMC Flywheel

Oh good grief.<br /><br />I re-read your post. Center magnet you say. Answered the wrong question.<br /><br />There is a timing mark on the flywheel. The N-S transition should align to the timing mark. <br /><br />(Anyone out there know whether it is the N-S transition, or the S-N transition?)<br /><br />Ken

 

[Dhadley]

Re: OMC Flywheel

There are two lines on the center magnet. Depending on what year and what model you have. In this case the lines for a 1985 V4 crossflow will be at about 11 and almost 6 using the keyway as 12. It has to be exact. Don't guess.<br /><br />If you can't find anyone with a "map" then just find a repalcement. And make sure you get the right one.

 

[Jbors]

Re: OMC Flywheel

Thanks everyone for all the info. I don't know where to find a "map" to realign the center magnet and the "trigger marks" are spaced at 180 degrees. I will still keep looking for a replacement any way since this is still the best option. I would like to know if there is any way a meter of any kind can be used to try an manually set the timing like I do for old style "points" ignition. I just wanted to try something till I get a replacement. Thanks again for all the help.

 

[Joe Reeves]

Re: OMC Flywheel

(Timing At Cranking Speed 4°)<br />(J. Reeves)<br />The full spark advance can be adjusted without have the engine running at near full throttle as follows. <br /><br />To set the timing on that engine, have the s/plugs out, and have the throttle at full, set that timer base under the flywheel tight against the rubber stop on the end of the full spark timer advance stop screw (wire it against that stop if necessary). <br /><br />Rig a spark tester and have the gap set to 7/16". Hook up the timing light to the #1 plug wire. Crank the engine over and set the spark advance to 4° less than what the engine calls for. <br /><br />I don't know the full spark advance setting your engine calls for, but to pick a figure, say your engine calls for 28°, set the timing at 24°. The reasoning for the 4° difference is that when the engine is actually running, due to the nature of the solid state ignition componets, the engine gains the extra 4°. <br /><br />If you set the engine to its true setting at cranking speed, when running it will advance beyond its limit by 4° which will set up pre-ignition causing guaranteed piston damage! You don't want that to take place. <br /><br />No need to be concerned about the idle timing as that will take care of itself. The main concern is the full advance setting. <br /><br />Be sure to use your own engines spark advance settings, not the one I picked out of the air here in my notes.

 

[Dhadley]

Re: OMC Flywheel

For a used replacement flywheel call Jack at Superior Marine at 800-338-9281 or Stan at Shoal Marine at 941-639-3012.

 

[Jbors]

Re: OMC Flywheel

Thanks again guys. I called Jack at Superior Marine and he said he has one and is shipping it out. He told me my system is a 10 amp. I have another question if you guys could help me again. When I got this boat and motor it had a bad power head and I replaced it with one I puchased from I-Boats. I was told in the setup instructions I recieved with the powerhead that I needed to reduce the full advance timimg by 2 degrees. I went to my carb cover to find out what the setting was supposed to be but the sticker is no where to be found. Can anyone tell me what the full advance setting is supposed to be for this motor. the info is in my original post. Thanks to everyone who has passed on all the great knowledge.

 

[Joe Reeves]

Re: OMC Flywheel

Curious as to the cost of the flywheel.

 

[Dhadley]

Re: OMC Flywheel

You should be able to run at 28*. If it's at 26 now, try it at 28. If it makes no difference put it back at 26.

 

[Jbors]

Re: OMC Flywheel

Thanks Dale for the timing info. Joe as to the price I paid for the flywheel, it was $100.00, plus shipping.

 

[jrmock]

Re: OMC Flywheel

OK, so I've used many forums on the web for information and repairs. Recently, while trying go get my 1993 50 hp Evinrude to start (after rebuilding the carbs, bypassing the oil pump, etc.), I decided to check the flywheel key to see if it had sheered and threw off the timing. It was fine, but while cleaning the inside of the flywheel I noticed the inner ring was loose. I assumed it may have something to do with spark timing.
It was here in your forum that discovered that indeed it is a trigger magnet for the spark timing and is normally in a fixed position on the flywheel as I thought. After reading this particular thread, and specifically about the "map", I spent the next week looking for it like it was a buried treasure. And guess what? I found it, epoxied the trigger into place and the engine runs better than it ever has.
Since the information here saved me as much money as it did, I decided to share what I had found. So, as my first contribution ever to an internet forum, I give you "the map". I hope it will help someone else as much as it did me. (I had to re-save it from a .pdf to .jpg so hopefully it is still of good quality.)