Yesterday  my 2004 yamaha 225 ox66 vmax wouldn't come up on plane. The bulb wouldn't pump tight so I changed it and of course it wasn't that simple. However when I pulled the cowling last night to start checking lines and filters I noticed that knock sensor was unplugged. Could this keep the motor  from coming up on plane?

Motors don't "come up on plane", but a detached sensor connection can and most likely will cause a motor to malfunction.

The unplugged knock sensor would definitely limit power.  This could keep you off plane.   

37 minutes ago, Deleted account said:

Motors don't "come up on plane", but a detached sensor connection can and most likely will cause a motor to malfunction.

Sorry for wording it incorrectly

"my motor wouldn't push my boat on plane" 

Update,  the knock sensor being disconnected was my issue.