Engines are from a Sundancer 370 Mod 98'

With only 800hrs

Original exhaust manifold bought in Feb 2022

Engine #1
Working perfectly
8 cylinders with 160psi compression 

Engine #2
Working with issues
6 cylinders with 150psi compression 
1 cylinder with 100psi compression
1 cylinder with no compression

Engine service done every 100hrs rigorously 
Semi-Synthetic Oils
New starters
New alternators
New cables and distributors
New water pump circulation