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#1
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But why then is there no evidence of an issue in the other cylinders? I have good compression on the other five and the top two on the right looked clean when I pulled the head. The two things that I don't get is that it was only a short burst of no oil, I mean short, and that only one cylinder went and the others are perfect.
-Svence
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1984 V-20 Steplift 1998 Johnson 175 
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#2
01-05-2009, 05:15 PM
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damage
Quote:
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#3
01-05-2009, 07:23 PM
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The damage normally only happens to one like SKOOLS said. I have a YAMAHA 250 that COMPLETELY lost one cylinder, yet it still ran on the other 5 and they didn't look that bad. It just proves that these engines run on a FINE line of just enough oil to live on with the VRO. If it leans out just a little, you can't predict what will happen. That fractional drop in oil though could have been just enough to finish that cylinder off, while the others escaped. If you think otherwise, look at how many MERCURY's have died on just one cylinder from the crank gear just beginning to slip.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD  AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664 
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#5
01-06-2009, 08:59 AM
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Did somebody mention PRE-MIX?
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'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha 
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#6
01-08-2009, 12:27 PM
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Figured these pics are appropriate to this topic. This engine was on a boat that I bought awhile back. It was a 93 MERCURY XR6 150 with the oil injection removed. The person I bought this from was 17 and had never had a 2 stroke before. The guy he bought it from told him he should double up the oil for the first tank, so he mixed it 100:1 instead of 25:1 like he was told. The other 5 cylinders were fine with 125 compression, but #2 was a DISASTER! And this was on pre-mix so no oil injection to blame, and the carbs were in tip top shape.
  
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664
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#7
01-08-2009, 12:44 PM
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Have you tried Budget Boats on Battlefield Blvd. They have a good colection of used motors and they also have news motors.
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