FLYWHEELS

[JAMESEPARMLEY]

I HAVE A 1979,35HP,JOHNSON ELECTRIC START,MODEL NO.#35E79A.IS IT POSSIABLE TO OBTAIN A USED FLYWHEEL?IF SO WHO,AND WHERE AT?CAN THE KEY SLOT BE PRESSED OUT AND A NEW ONE PRESSED IN BY A MACHNIST?IF SO,WHERE DO I OBTAIN A NEW KEY SLOT,AND WHERE DO I HAVE IT PRESSED IN AT?CAN A MACHNIST CUT A DEEPER KEY SLOT IN MY FLYWHEEL WITHOUT CREATING ANY OTHER PROBLEMS?MY OUTBOARD MOTOR KEEPS SHEARING OFF MY WOODRUFF KEY.THE KEY SLOT LIP ON THE FLYWHEEL IS ROUNDED OFF AND MISSING A SMALL PIECE.I NEED INFO FROM THE FORUM USERS WHO HAVE ENCOUNTERED THIS PROBLEM BEFORE FOR THE MOST ECONOMICAL AND FEASABLE SOLOUTION.I KNOW FROM READIND THE FORUM THAT JOE REEVEES IS A VERY RESPECTED AND KNOWLEGABLE PERSON ON THE FORUM,SO JOE IF YOU CAN HELP ME OR SUGGEST A DIFFERENT APPROACH OR SOLUTION IT WOULD BE GREATLY APPRECIATED,THANKS AGAIN, JIM PARMLEY(STURGEON GENERAL).REPLY TO JAMESEPARMLEY@COMCAST.NET OR PHONE 925-757-3207 S.F.BAY AREA

 

[rodbolt]

Re: FLYWHEELS

hello<br /> it is imperative to check the fit of the tapers. if you look about on the posts in the evinrude forum I have gone through this recently. the key just index's the flywheel. it does not and cannot hold it as you have found. your flywheel may still work if you properly lap it to the crank. you can tighten the flywheel nut till the snout breaks and if the tapers are not within .0005" ( about1/6th the dia of the average human hair) in concavity and convexity it will shear another. the flywheel is held entirly by the fit of the taper.<br /> fix the problem or the next flywheel will shear another.

 

[AMD Rules]

Re: FLYWHEELS

Rodbolt & DHP are both correct. Lap the taper & torque nut to specs. You will forever be shearing the key if the tapers do not fit properly.<br /><br />If your keyway in the flywheel is damaged beyond repair, the best option may be to replace the flywheel. Even then, it is best to hand lap the taper on the replacement to ensure a good fit.<br /><br />If you can't find a flywheel locally, a good resource for older parts is www.twincityoutboard.com

 

[DHPMARINE]

Re: FLYWHEELS

Jim,common cause for key breaking..... Improper torque on flywheel nut.Not sure on your motor,but older 40 HP is 105 lb.ft.<br />DHP

 

[JAMESEPARMLEY]

Re: FLYWHEELS

THANK YOU DHP,RODBOLT&AMD RULES FOR YOUR REPLY AND ADVICE.I'LL CHECK THE FIT OF THE TAPERS AND APPLY THE PROPER TORQUE TO THE FLYWHEEL NUT AND I'LL LET YOU KNOW THE RESULTS.I'YE SEARCHED THE WHOLE BAY AREA,SACRAMENTO,STOCKTON & SAN JOSE FOR A USED FLYWHEEL.I MUST BE THE ONLY PERSON WHO HAS THIS MAKE AND MODEL OF ENGINE,HA!!!!ANY IMPUT ON WHERE TO FIND A USED FLYWHEEL WOULD BE GREATLY APPRECIATED,THANKS AGAIN JIM.

 

[rodbolt]

Re: FLYWHEELS

hello<br /> did you find my post on how to check the taper and lap them?

 

[JAMESEPARMLEY]

Re: FLYWHEELS

RODBOLT,YES I DID RECEIVE YOUR REPLY AND I WANT TO THANK YOU AGAIN.WITH WORK AND THE DAYS BEING SO SHORT I HAVEN'T HAD TIME TO WORK ON ENGINE,I PLAN ON DOING IT THIS WEEKEND.I'LL LET YOU KNOW WHAT HAPPENS YOUR FRIEND JIM.

 

[JAMESEPARMLEY]

Re: FLYWHEELS

Joe and Rodbolt, Thanks very much for the sound advise. I cleaned up the flywheel keyway installed new key and torqued the nut to 105ft pounds, started the engine warmed it up and retorqued. engine ran great. was fishing that night. thanks again.<br /><br />Jim the Sturgeon General

 

[rodbolt]

Re: FLYWHEELS

did ya check and lap it ?<br />

 

[GatorMike]

Re: FLYWHEELS

I always thought the most common cause of shearing the woodruff key was a backfire due to improper timeing.

 

[lark2004]

Re: FLYWHEELS

backfire combined with the key driving the flywheel, due to improper fit/torque. make sure that after lapping, you torque it down properly. Remember, the key is ONLY a locator, as several others have pointed out, the taper drives the flywheel