If I swap a Mercury 1973 1500 powerhead with one from a 1977 which years specs should I use? According to the manual I have the only difference is in the timing 1973 has 6 btdc for the throttle pickup - primary, 1977 has 1-3 btdc.
Or does this statement cover this?
" All of them are speced different, but if the 1st pickup hits at 3-4 degrees BTDC advance - you win"
Thanks!
Or does this statement cover this?
" All of them are speced different, but if the 1st pickup hits at 3-4 degrees BTDC advance - you win"
Thanks!