Home › Forum › Ask A Member › Top speed with 18hp Evinrude on 14′ aluminum › Re: Top speed with 18hp Evinrude on 14′ aluminum
January 15, 2017 at 1:19 am
#51054
You guys were right. Both cylinders compression have dropped since I last checked it. I checked them with two different gauges, One gauge read top, 90 bottom 92, the other gauge said 80/82. The top spark plug was white, not chocolate, the bottom plug was chocolate. Most importantly the top cylinder (which is the one I took the pic of with the plate off) failed the leak down test miserably. The bottom cylinder shows "moderate" loss on the leak down. Looks like I’ve been running mostly on the bottom cylinder,.