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  1. 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...
  2. shellone

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

    Commander Mike ! YES ! You made my day. The confidence with which you ruled out sensors gave me a new push and I actually and finally made a good connection of the neutral safety bypass (welded and isolated) which probably was as intermittent as the switch itself and after that no more failures...
  3. shellone

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

    Yes, obviously there is some connection that at times is interrupted ! Do you have any suggestion where I might start looking for the cause ? I checked the ignition key lock, the neutral switch (shorted it temporarily), the solenoids and all contacts and cables bringing power to the starter. My...
  4. shellone

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

    Have checked major connections, the solenoid and the starter to all be good ... in fact many times it works just fine and cranks fast. It is just that, sometimes, the system is interrupted, just like if I tried starting with the gear engaged. Doing nothing it might work at the next try. Do not...
  5. shellone

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

    Thanks, went through the list and checked everything all to work but the neutral switch. I found two cables (yellow and yellow red) come out of the throttle box but do not know how to test the neutral switch ... and do not find the info on that great guide ...
  6. 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...
  7. shellone

    OMC 5.7 V8 power loss

    Thanks Scott ! Given the continuing unavailability of qualified technicians, for now I am happy to have replaced the points and the condenser, set to the right 'moment' and registered them with 0,4 mm aperture. Engine started fine, runs smooth and I will soon test it on the water. Funny enough...
  8. shellone

    OMC 5.7 V8 power loss

    For a very brief moment, after cleaning the carb, with the boat out of the water, I started the engine and it ran fine (like I had never heard before). Then it began misfiring, more and more frequently. It seemed to be cyl. 2 and 6, then 3 and 4 ... so I realized that the contact in the...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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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