Re: 89 Mecury 100 Cylinders Flooding
I had the same thing, mine was an 87 Sea Ray, bought it brand new.
Had the 100HP "2+2" motor. Only runs on 2 cylinders at anything less than about 1800 rpm.
After about a month of use it started doing the exact same thing, Took it back to the Dealer 3 times, they couldn't figure it out till one of the OLDER part time mechanics over heard us talking about it. He walked over to the boat, opened the oil tank cap and SMELLED the oil tank! He then came over and told the Service guy HE knew what the problem was. Sent us out to lunch and when we came back it He said it was all fixed.
He handed me a set of 4 new plugs, and a gallon jug of injection oil.
Said first time out it WILL do it again, change the plugs then and it will never do it again....Unless you put that cheap injection oil in it, He said to use ONLY the expensive Johnson/Evenrude stuff that smells like amonia.
HE was right.
He had drained the oil tank and refilled it with the Johnson/Evenrude oil.
Bottom line is I was using the cheap oil from kmart. it leaves deposits on the plug that fouls it.
From then on i only used the Johnson/Evenrude oil and NEVER again had a problem with it.
I did a lot of trolling for 3-4 hours straight, when it was time to go I could just slam the throttle and it would jump right up and go.
My uncle still has that boat up near Detroit, and once every few years he calls me and says he did it again, put the wrong oil in it. he changes it back and it runs fine again.
