timming

[David C]

Could someone explain the proper method of adjusting the points and cheching the timming on my1942 evinrude 4364 2hp motor.Is there a mark for TDC.It seems that my points are closing way to early ? Thanks Dave R

[joecb]

There may be a more sophisticated way to time on that motor, but the usual way is to just set the point gap accurately at 0.020″.  All will be good if done this way, assuming that the flywheel , crankshaft and key are all intact.

Some of the later OMC motors do have timing marks on the mag plate and flywheel to accurately set or check the feeler gage setting. I doubt that your motor has such marks.

Joe B

[Buccaneer]

Adjust the points to .020 and you’re done.
The points will only open early if the mag plate is advanced
past the “half way” point, or so.
I doubt if that model has a removable points cam that could put
on upside down.

Prepare to be boarded!

• This reply was modified 2 years, 4 months ago by Buccaneer.

[frankr]

David C wrote:

Could someone explain the proper method of adjusting the points and cheching the timming on my1942 evinrude 4364 2hp motor.Is there a mark for TDC.It seems that my points are closing way to early ? Thanks Dave R

????Close too early???  The ignition spark occurs when the points Open. Not when they close. 

[wedgie]

If I am not mistaken, it’s more important for the points to open at the correct time .

[Tubs]

In this ignition system moving the magneto
lever back and forth changes when the plug
fires as related to the position of the piston.
Before TDC – TDC – After TDC – depending
on the lever’s position so the timing is always
changing as you run the motor.
The only fix timing setting is having the points
open just as the polarity of the magnet changes
(usually from North to South) as it passes over
the coil. The factory point gap setting is meant
to get you close enough in motors when you
don’t have a timing tool or no tool was ever
available.
When the points close isn’t relevant.
Tubs.

A "Boathouse Repair" is one that done without having tools or the skills to do it properly.

[Author]

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