i have a 87 sunray 21' built in anaheim ca (they are no longer in business) with a omc 5.7L and a 800 stringer out drive. My tach does not work. idk why. i dont know ANYTHING about boats so any help will be appreciated. what should i check. where does the tach get its info from on the engine? maybe thats bad? a sensor or something. idk. havent been able to find a answer to my question for 2 weeks now.
http://s126.photobucket.com/albums/p105/hpistar25/?action=view¤t=Boat.jpg
http://s126.photobucket.com/albums/p105/hpistar25/?action=view¤t=Boat.jpg