I have a 1989 Johnson J70TLCEM 70 hp that idles at around 1000-1100 on muffs but put it in the water and it drops to 750-800. How do I get this so it idles at 1000-1200 rpms in the water? It will stall out of the rpms get too low. Replaced all filters and lines yesterday and check spark air gap...
I have a 1988 javelin 356 with a 1989 Johnson 70 hp vro on it. Currently have a 12.75x17 four blade prop on it running at 5300-5400 rpm at wot. I am getting 32 mph gps speed from it. Looking for ideas on how to get more speed with a decent hole shot. I have the original prop for the motor it is...
