Timming adjustment

[michaelhedges]

I have a 1992 Johnson120tland. After I have lost some power I did the usual plugs and wires. No better. I then aqired a main. book and did a link and synk and tried to check the timing. Restored most of lost power with the L&S. After trying to adjust the timming I noticed that turning the adjustmnet screw will not affect the timming The timming is only off a little at 18 degrees TDC. While adjusting the timming I did get the motor to 4500rpm at the launch but need more help to get it higher than this. Is this the problem?
Any help is appreciated.

 

[ezeke]

Re: Timming adjustment

You are dealing with a QuikStart ignition.

 

[Chris1956]

Re: Timming adjustment

Mike, You need to check the compression. If the PSI between the "lungs" is even, the power can be restored via a carb clean, timimg adjust and/or ignition repair. If the compression is not balanced, the motor will not develop full power.

 

[kenmyfam]

Re: Timming adjustment

How about a decarb ????