Search results

  1. J

    Sport Jet 90 head warpage limit

    I lost my top piston, and that cylinder was rather clean, like I had cooling water leak into it. I had no evidence of any burn-through on the compression rings of the head gasket or other marks on the sealing surface. I will check the block carefully, but I still suspect that the water came in...
  2. J

    Which forum for Merc SportJet engines?

    Where should questions about the SportJet engines be posted? Here in Mercury? With the I/O repair place?
  3. J

    Mercury SportJet 90 Stalling

    This message was started a couple of weeks ago and was deleted by Steve along with all the other recent posts.<br /><br />I have a 1994 SportJet 90 with the Force 3 cylinder powerhead. After running for approximately 10-15 minutes the engine seems to drop a cylinder and then totally stalls. It...
  4. J

    1963? Clinton "Apache" 5 hp air-cooled

    My folks bought this engine new in 1962 or 1963 from Sears, I believe. They remember it as being a 5 hp model.<br /><br />Model No.: J9 1106<br />Serial No.: 30620<br /><br />I would appreciate answers to the following questions. I really want to get this going again.<br /><br />1) What spark...
  5. J

    Mercury Sportjet 90 regulator/rectifier

    I have a question about the testing of a Mercury Quicksilver voltage regulator number 883071A1. <br /><br />The red stator went bad on my boat, so I ordered a new one. I confirmed that it was bad by resistance testing. <br /><br />I tested my voltage regulator to determine if it was bad...
Top