A couple of thoughts -
you mention above “ fifth... I get 12 degrees total at idle “ this is what you should get per merc manual ...does it advance to 22-26 degrees goal by 3 k rpm now? The 12 degrees total looks to me like it is doing what it should except for going into base / maint mode.
Since you are maintaining power to the white while trying to put in base/maint mode- what voltage do you have at idle? Is it possible to due to battery or alternator condition at idle ( or below the 1800 rpm you mention) you have lower voltage and that is what is kicking it out of base / maint mode? Had an issue on an older boat where at idle alternator wouldn’t kick off enough volts to open the choke consistently, maybe similar??
bottom line if you replace the distributor if you run out of options just get an OEM of what’s there no need to reinvent the wheel- delco est distributors are like $220, whole intimation kits is like $350 , assume this is what you have no?
you mention above “ fifth... I get 12 degrees total at idle “ this is what you should get per merc manual ...does it advance to 22-26 degrees goal by 3 k rpm now? The 12 degrees total looks to me like it is doing what it should except for going into base / maint mode.
Since you are maintaining power to the white while trying to put in base/maint mode- what voltage do you have at idle? Is it possible to due to battery or alternator condition at idle ( or below the 1800 rpm you mention) you have lower voltage and that is what is kicking it out of base / maint mode? Had an issue on an older boat where at idle alternator wouldn’t kick off enough volts to open the choke consistently, maybe similar??
bottom line if you replace the distributor if you run out of options just get an OEM of what’s there no need to reinvent the wheel- delco est distributors are like $220, whole intimation kits is like $350 , assume this is what you have no?
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