Hi Guys, One of my machines (23HP Kawasaki) with about 1500 hours recently just started to smoke (burn oil). It smokes a lot when I first start it, then less and less until there is no smoke at all and it seems to run normally. The smoke lasts for a few minutes then dissipates. A few questions: 1. What causes this? 2. Is it cost effective to repair or replace an engine like this? 3. What will happen if the engine continues to run, while burning oil/smoking? Thanks!