1979 Mercury 115 flywheel removal

Question

s/n 5416341 I'm having a VERY difficult time removing the flywheel in order to gain access to change out the trigger mechanism. I am usint a harmonic balancer puller and she is dag on tighter than i dont know what...I have read about a special tool that is used specifically on the merc outboards, I dont pull flywheels on mercs too often so I cant justify buying one as these arent cheap. My new trigger is on the way and I'd like to have it tore apart as to when it arrives I can put er back together....ive already used pb blaster and heat along with a brass hammer to try and persuade it off with no luck...Any ideas? - Bob

Answer 1

Just gotta keep working at it. Sounds like you're on the right track. Tighten the puller down tap the puller with a hammer, tighten a little more, tap with hammer and just keep at it.

If you can get a pry bar under the flywheel without tearing anything up, have a buddy hold preasure with a pry bar when you tap with the hammer.  

Answer 2

The special tool is the thing. If in salt particularly. Your way will work with patients. The ST screws into the hub like a motorcycle tool. Then the big pusher goes down the middle. See if you can't put a deposit down and borrow one- or just take it to them and pay the 1/2 hour minimum. Money well spent to keep the buggar from eating it's way thru your motor cover at 5000rpm.  

Answer 3

You only need to get it to move a little.  The Puller your using should work, I've used them before, just be sure your even on all three screws.  I know your soaking it in penitrating oil.  try Putting (wedging) something under the flywheel. Pick a spot that won't damage anything.  Then pun an old nut on the crank to protect the threads. s***w it down but stop before the crank thread could be damaged, because I want you to hit the puller s***w really hard!  Then tighten it and hit it again.   Might work!   The only other trick is to cool the crank shaft with ice or CO2, not the flywheel.  Use a bigger hammer!!!!  BOL