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  1. Miles2000

    2004 Mercury 90hp engine starts, stalls with in seconds.

    Before you change any more parts, run it off a portable tank. Hook a 6 gallon portable straight to the engine, bypassing the boat's line, primer bulb, separator and antisiphon valve. If it stays running, the problem is on the boat side, and the tank vent is the first suspect. A partially blocked...
  2. Miles2000

    1988 DT 85 Oil Leaking from Underneath Powerhead

    Your lower crank seal is very likely it, and the running symptoms line up. On a two stroke the crankcase is the primary compression chamber, so a leaking lower seal pushes oil out and pulls air in on the upstroke. That extra air leans the mixture, and lean is what makes one sputter and die the...
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