Johnson 2002 9.9 conversion to 15 hp model j10tel4

[angelo]

hi, my name is Angelo, i have a johnson J10TEL4 of the 2002, i would like to conversion (upgrade) it to 15 hp. on the site (boats.net) I saw parts of which the two engines differ, which should be:
-5033042 *JET, MAIN (123.8) 15HP
-5033043 *JET, PILOT (47.5) 15HP
-5032731 CDI UNIT 15HP
-5033068 CAMSHAFT ASSY 15HP (Electric Start Models)
Some of you have already made ​​this change.
I wanted to know how to put in phase the camshaft, after it replaced.
Waiting for an answer Best regards