hey all im in he process of swtching my 82 inline 6 90hp merc for a 88' 70hp merc...yesterday i began removeing some of the control cables and such from the 90 i plan on using the same controls for the 70 so far the steering ,gear and throtle linkages look like they will bolt right on.....the power trim on the 90 uses 2 hydulic lifts with the motor and oil tank bolted in my boat where the 70 seems to have a self contained system right on the outboard so i dont see this being a real problem but its hard to tell unill i get the 70 on the boat the main thing that im worried about is the wiring harness he 90 has a big round plug just in side the front cowling wich i dissconected and i noticed that its again pluged in inside of the boat at the rear ..sorta like an extenion cord i assume this would be for ignition ,choke etc.. so i guess my question is if anyone knows what i might have to do or buy to hook this up that would be great............... im very new to this 70 and know nothing of how it fucntions it has a big black air box so i havent seen if it has a choke and i have not seen a primer also i havent seen any sort of a hook up for the ignition or the power trim please keep in mind that i was alone at he time(hard to move around) and the 70 is sittin on its side in my truck so there may be things on that side that im not seeing any help would be awesome thanks in advance