1987 Looper v4 140 RPM only 4000

[Skools Out]

Originally Posted by nymack66

I was told my engine is a 1987 E140tlcua,

Originally Posted by nymack66

I remove a SS 14x3/8 x 19 only going 3000 to 35000 rpm, I install a 14.8 x 17 aluminum it is a 15 spline prop 3 blade.

Wrong lower unit you have a V6 lower unit none of the short shaft 20 inch motors had 15 spline lower units, they had 13 spline. Only the 25 inch 120/140 motors had 15 spline lower units. It could still be a 120 power head. My 120 and my 2 twin 140's both have 62D jets.