Flywheel of incorrectly; Does it matter?

hume · Post by **hume** » Sun Oct 07, 2007 12:21 pm

I pulled the flywheel off this afternoon; My intention is to chek the bearings (see other message: Vibrating and poor power).
I was in a hurry, as I had an assistant, and totally forgot to set the iston at Bottom Dead Centre. BOTHER!!
What damage could I have done, and how can I tell? What will I have to do to fix it?
Hume

Hugz · Post by **Hugz** » Sun Oct 07, 2007 10:05 pm

I did that the other day with no damage..... used a lump hammer too!

niander · Post by **niander** » Mon Oct 08, 2007 9:19 pm

Can someone explain what difference the piston position is when doing this?

Hugz · Post by **Hugz** » Sat Oct 13, 2007 11:45 pm

Hi, I believe the reason to be that at the bottom position there is less movement for the U in the crankshaft to flex together if hit too hard. ie the conrod is filling up the inside of the U. There is still a gap between the conrod and the U but there is also a counterweight taking up some room that extends past the crankshaft and that extends the U also. If there was some flexing this would take up on to the rod limiting damage. There is still the posibility of damage if thumped too hard in my opinion. Tis hard to explain!

I could be entirely wrong tho.

Hugo.

chris · Post by **chris** » Sun Oct 14, 2007 1:20 am

you do more damage not hitting hard enough
If you have a second person they can lift up on the flywheel when you give it a big hit.
I have never worried about the position of the piston when I am taking off the flywheel or putting it on but so far I have been lucky as they have come off easily.

niander · Post by **niander** » Sun Oct 14, 2007 10:42 am

counterweight taking up some room that extends past the crankshaft and that extends the U also. If there was some flexing this would take up on to the rod limiting damage.

Ok probobly that...

chris · Post by **chris** » Mon Oct 15, 2007 2:40 am

it is easy to get complicated with these motors but they are one of the simplest and easiest outboards to work on, they don't need any special tools, and only basic knowledge.
They are also low on maintenance, My 1942 102 gets a lot of use and rarely gives problems, the longest run i have done with it was 6 hours only stopping for refueling.
I carry a big and small adjustable spanner and a big hammer and a couple of good screwdrivers and strong pliers and also a roll of wire. A very specialized tool kit. Also of course plugs and prop springs. and a can of spray lubricant.