timer base?

[lee powell]

Hi: everyone,

1989 90hp Evinrude and Evinrude manual.

Joe Reeves timing procedure say to set timer base under the flywheel tight against the rubber stop on the end of the full spark timer advance stop screw (wire it against that stop if necessary).

Being that I don,t have the timer advance stop screw would I just open my throttle to full throttle against the throttle stop screw? That would advance my timing forward, I not sure it would advance all the way enough or not.
Thanks
Lee

 

[petryshyn]

Re: timer base?

Yes, open throttle to bottom on WOT stop screw.

Cheers..

 

[lee powell]

Re: timer base?

Thanks petryshyn,

I messed with this morning and assumed that's the only way it could work.
Took it out to the water and made the rest of my adjustments. Still having problems in the mid range throttle. Sounds like it is misfiring or stalling.
Thanks again,
Lee

 

[petryshyn]

Re: timer base?

Is it fine at WOT? What RPM are you getting at WOT? If its fine at idle and WOT, but misses at mid throttle, it may be plugged jet/jets in the carb/carbs.

The carbs are nice to work on. It never hurts to clean the carbs on an older engine. Especially on multi carb units.

 

[lee powell]

Re: timer base?

Thanks petryshuyn,

I rebuilt the carbs last weekend, soaked in carb cleaner, removed all 6 orifices from each carb, cleaned out with a wire and blow air pressure thru them with 25 psi.

It might be somewhere in the link & sync I did the other day. I need to run back thru it again.

All fuel lines have been changed with the proper zip ties. Only lines not replaced where the primer lines feeding the cylinders. have not found them here locally yet.

I don't have a tach as of yet but will soon, so I can watch what is going on with my motor.

Thanks very much for your replies,
Lee

 

[petryshyn]

Re: timer base?

the primer hose and recirc hose can be purchased by the foot from Sierra.

Have you done a compression test and spark test on this engine?

 

[lee powell]

Re: timer base?

Yes the compression on all 4 cylinders is 122 pounds even on all cylinders. New compression gauge and I checked twice to verify the readings.

Spark test checked out ok with a 7/16 gap and a strong blue spark. The spark was intermedent at times so I pulled the coils and they where very corroded on the block where they mount. I cleaned the block and coils and reinstalled them. I also pulled stator, power pack, timer base, cleaned the bolts and block and changed them with used parts that checked out ok. And cleaned all grounds. Coils checked out ok with the Ohm test. I may still be losing spark, that may be the mid range missing that I was hearing Sunday on the water. I just got home from work and going to check spark again to see if it is the problem.

Thanks again for the reply petryshyn,
Lee