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Questions for Johnson 15R74S

L

LucVinet

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" I dont have the manual for t

" I dont have the manual for this engine but I would appreciate if someone could help me with these subject.
1) I removed the lower unit and i found a small broken o-ring in it (approx 7/16 dia X 1/16) Where does it go?
2) Is there suppose to be a gasket betwheen the water pump ousing an the plate and/or betwheen the plate and the lower unit ousing?
3) What is the best way to check if the timing is good(ajusting the points to .20"?)?
4) What is the original setting for the slow speed adjusting screw?
5) When you put the engine back in the motor ousing, do we have to put some kind of a scellant with the new gasket or just put a new gasket will do the trick?

Regards,

Luc "
 
"1 - O Ring goes on top of the

"1 - O Ring goes on top of the driveshaft, in the groove under the splines.

2 - No gasket under the pump plate.

3 - With flywheel key aligned with fiber rubbing block on points, set points to .020.

4 - (Carburetor Adjustment - Single S/S Adjustable Needle Valve)
(J. Reeves)

Initial setting is: Slow speed = seat gently, then open 1-1/2 turns.

Start engine and set the rpms to where it just stays running. In segments of 1/8 turns, start to turn the S/S needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running.

Eventually you'll hit the point where the engine wants to die out or it will spit back (sounds like a mild backfire). At that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

When you have finished the above adjustment, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.

5 - I gasket has a glossy coating use no sealer, otherwise use regular gasket sealer thjat comes in a can that has a small brush attached to its screw off cap.

Suggest you get a manual at:

http://www.marineengine.com/manuals/johnson/

Joe
"
 
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