#15 is the high speed jet.---Calibrated to provide the correct amount of fuel at full throttle.-----Often forgotten / overlooked during cleaning.----Or missing altogether when changing out warped float bowls.
What pitch is the prop that you are using now?-----And is the motor well maintained?-----You need a new water pump impeller in that motor about every 5 years.----Or test the hot / overheat horn , if control box has one.
Not many pontoon boats in my area.----But pontoons are generally slower through the water and may not develop as much water pressure.----Hence the different spring.-----Your local Mercury dealer will likely help you on this.
There must be a --Chriscraft ----Owners group.-----Or Antique boat club online.-----Many of those folks are very helpful.---Boat museum in Clayton , New York is also a source.----Was boat properly winterized ?
I believe that site has the exact wiring diagram for your motor.----But do a complete evaluation on this motor BEFORE spending beer tokens on it.-----And --"great compression " -- means nothing to me.----Post the actual / accurate values.
