72 Johnson 85hp half fire

[F_R]

?----There are no condensers on that system !!

Yeah, what's going on here anyway?

 

[racerone]

You just never know with these older amplifier systems.-----Maybe it is a conversion to a points / condensers / 12 volt coil.----Without peektures it is hard to tell.

 

[F_R]

You just never know with these older amplifier systems.-----Maybe it is a conversion to a points / condensers / 12 volt coil.----Without peektures it is hard to tell.

That was my gut thought also. Except post #14 says he checked the amp. Sounds like we are being had.

 

[Joe Reeves]

That was my gut thought also. Except post #14 says he checked the amp. Sounds like we are being had.

I don't understand... he said that he has a 1972 85hp Johnson... a points ignition system with Battery Capacitance Ignition with no spark on the port bank. That, to me, spells out either one bad set of points or a grounded point lead wire. What am I missing here?

If it was the coil, amplifier, distributor cap or rotor that was flawed... it would affect more than just cylinders 2&4.

 

[Tubbsharper]

Exactly what joe said but I have had distributor caps fail. And F_R if anyones being had it's ME:facepalm: will try to get out an snap a few pics for those who are in disbelief

 

[racerone]

And where are the condensers ??----And what is the part # on the distributor cap ?-----What are the cylinder numbers on the cap and what order are they in ?----Did this motor ever run properly for you ?

 

[Joe Reeves]

And where are the condensers ??----And what is the part # on the distributor cap ?-----What are the cylinder numbers on the cap and what order are they in ?----Did this motor ever run properly for you ?

Yeah, that sort of stopped me for a second, then I remembered that the 100hp with Battery Capacitance Discharge ignition had points which were simply acting as a switch to the amplifier's circuitry, replacing the sensor & magnet setup used on other models... and no condenser was required. Getting to an age where it's difficult to remember it all (I saved the manuals).

 

[Tubbsharper]

And where are the condensers ??----And what is the part # on the distributor cap ?-----What are the cylinder numbers on the cap and what order are they in ?----Did this motor ever run properly for you ?

Yes for about 20 minutes the sputtered and poof still running just TWO cylinders not backfiring or dieing out. I will put pictures on later for those people who would like to see

 

[racerone]

When did the motor perform properly for you out on the lake and how long have you owned it ?-----When you answer we may be able to steer you in the right direction.

 

[Tubbsharper]

Never had it on water only had this one for about 3 months now. when I got it was missing starter so kinda was a shot in the dark de-carbed her new fuel line plugs an she fired right up

 

[Tubbsharper]

Okay got the timer base out... SORRY to you all . You all was right no condensceners just pick up points so???

 

[racerone]

There were a number of questions that still have not been answered.

 

[Joe Reeves]

Dropping out of here... been neglecting the yard work... cat jumped off the patio step into the grass and disappeared... buildings need pressure-washing... house needs painting... never ending!

Nothing more I can add to this thread... re-read everything Tubbs and cross your fingers. Good luck.

 

[Tubbsharper]

thanks to all who gave effort and time found the problem. The timer base wire was cracked all 4 get fire now to set the timing