weight of 1999 mercury 200 efi
most merc 50hp with efi and electric start have a 18amp alternator. This from mid 90's to now
Follow the link for the steps.
475lbs
The 1997 model Mercury, 225 hp EFI uses a NGK BR8HS plug, gapped to .035 in.
The Mercury EFI outboards require a minimum octane rating of 87. Since the engine will operate on the lower octane fuel, it is a matter of personal preference.
your motor details: Product Information Serial Number: A953275 Model Number: MER 1924816 Manufacturing Year: 1987 Description: EFI
Need to know the Model (Optimax, XR, Verado, etc) and a year would be helpfull too. model xr year1999
71-77kgr for 25hp EFI
5000-5500 rpm
1987
I believe that fuel injection was available on the 1985 - 5.0 L ( 302 cubic inch - V8 )