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  1. shellone

    Mercruiser 7.4 Carburetor 9777s needs repair kit

    A 7.4 engine serial OF079329 from I believe 1994, probably with the original stock 4 barrel carburetor. The carb has number 9777s 0983 carved in the front. Is this number enough to identify what make and model it is so I can start searching for a repair kit ?
  2. shellone

    Battery disconnect while running engine

    While running a BWA 8 meter rib with a Mercruiser 5.0 MPI in rough weather I had sudden power loss and noticed the voltage rise over 14.4. Throttled down to idle and immediately checked the battery to notice that the a ground connection looked loose. Tightened the screw and the voltage was back...
  3. shellone

    Buzzer gone wild, will not go off

    On a Searay 250 EC I have a Merc 7.4 with a Bravo drive; double propeller. No secondary gear lube container. The boat is on land since last August, everything was fine two months ago during last test. Today, 15 seconds after turning the key to 'on' a buzzer started (I say 'a' because I do not...
  4. shellone

    Pausing to cool down

    When on a 100 mls. + tour with a 24footer and a Mercruiser 5.0 MPI, is it sound advice to slow down off gliding speed and forward idling for some minutes or is it better to keep it running at a steady rpm? My cruising speed is 25 knots @2800 rpm, and I welcome knowledge whether it is advisable...
  5. shellone

    Mercruiser 7.4 from 1999 will not start (starter not turning), sometimes

    Hi ! Can someone help me troubleshoot the following issue: I have a perfectly running Mercruiser 7.4 (serial OF 437348). Only problem is, sometimes turning the key will not start the engine, the starter will not turn, the voltage does not change (drop). It is as if I tried to start the engine...
  6. shellone

    OMC 5.7 V8 power loss

    It must be an 1989 recently rebuilt V8, runs smooth but does not develop full power when requested. Initially, cleaning the valve just at the fuel tank (with the ball and the spring) did the job, maybe some debris got to the fuel filter. Am on a long trip, tried to find a replacement filter to...
  7. shellone

    After internal (main) oil tank replacement on a Yamaha V6 200 from 2002

    Was forced by a broken connection to the aux. tank to replace the main, internal oil tank. From the bottom of the tank a hose goes vertically down into the oil pump, so it looks like nothing can go wrong ... Yet I wish I can determine that the oil pump is functioning properly, before taking out...
  8. shellone

    My boat is taking water ! About 2 gallons per hour, regularly ...

    On a Chapparal 205 SCI with a 5.0 Mercuiser V8 I have an alpha one 2nd gen drive. One of the trim pistons got stuck before summer and I had to replace it. To access the sunk-in screws I had to remove the block anode, which actually was in good conditions ... so I just placed it back after...
  9. shellone

    How can I determine the year made and exact model number?

    I have a Chaparral 205SC with a Mercruiser 5.0 litre engine; need help to find info re. year build and model number to order parts and more. All I know is that the engine is called MCM 5.0 litre, 305 CID, has a Thunderbolt 5 ignition and the serial reads something like MO-87320. Searches in...
  10. shellone

    Tiller Handle 1988 521

    I need to replace the throttle cable between the handle and the powerhead, but do not find any guidance in my Clymer handbook as to how I can remove the tiller handle. I have read about hidden screws in the rubber sleeve but just cannot find them!
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