Hello;<br />I have a 1995 Johnson 150 V6. <br />At startup, the engine smokes alot until warmed up. After a day of running, at least one spark plug is fouled (rpm drops from 5500 to 4800).<br />When I check the plugs, all of them are wet with oil.<br />I took the boat to the local Johnson dealer. <br />They changed plugs and said everything is fine. They also said to be glad it smokes a lot at startup.<br />I have done a compression check, and all cylinders measure between 100 and 110 psi of compression.<br />Can anybody help with why this engine may be over-oiling the fuel.<br />p.s. there are no adjustments (oil, carbs, anything) to make on this engine.<br />Thank you very much.