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  1. R

    Fuel supply issue

    Regarding the solenoid and how it works, here is a pic of mine to the right of the fuel pump. The input to the solenoid comes from a hose from the bottom of the float bowl of the upper carb; then there is a hose out of the solenoid that splits into two hoses; they do not go to the carb bodies...
  2. R

    Yesteryear '92 Merc 40 Idle Problem Solved in 1994

    Three years after I bought my '92 Merc 40 4cyl 2stroke, it refused to idle but ran OK at cruise speed. Local dealer mechanic diagnosed the problem as sticky needle valves in the carb bowls. He took off both carbs, cleaned them, re-installed. Result: boogered every fitting on the carbs (pliers...
  3. R

    No spark on mercury 150

    See my thread on my '92 Merc 4 cylinder 2 stroke with the same problem: http://www.marineengine.com/boat-forum/showthread.php?458768-Yet-Another-Merc-40-2-Stroke-With-No-Spark. Have shop manual and it walked me thru diagnosing my bad stator; one component I could not test was the switch box -...
  4. R

    Yet Another Merc 40 2 Stroke With No Spark

    Inadvertently deleted a picture of my electrical box:
  5. R

    Yet Another Merc 40 2 Stroke With No Spark

    Here are some pics; had to go to the 'Go Advanced' button and then click on 'Attachments' button; easy from there; the second pic shows the stator in my flywheel - very snug fit with almost zero clearance with the magnets. One last thing; noticed a type of grease on the flywheel center collar...
  6. R

    Yet Another Merc 40 2 Stroke With No Spark

    This post is a continuation of another post of mine - Yet Another Merc 40 2 Stoke 4 Cylinder won't idle http://www.marineengine.com/boat-forum/showthread.php?456445-Yet-another-Merc-40-2-Stroke-4-Cylinder-won-t-idle In that thread, the fellas on the forum determined that the carbs needed...
  7. R

    Dangerous condition - '92 Merc 40 4 cylinder 2 stroke

    Several years ago, 2014, I got a nasty surprise when prepping my Merc in the driveway for the summer season. The engine at that time had 23 years on it. I just happened to glance at the 2 clear oil lines on the starboard side bottom of the power head. Those lines go from the oil tank to the...
  8. R

    Compression test of '92 Merc 2 stroke 4 cylinder

    Folks, I am about to do a compression test on my '92 Merc 2 stroke 4 cylinder. I have still not found a pontoon trailer to pull it out of the water so I can work on the carbs (marinas are booked solid with repair work) - see my other thread on that at...
  9. R

    Yamaha 40 EFI Outboard Manufacturer

    Hello folks, I am considering re-powering my pontoon with a Yamaha 40 or 50 EFI. Does anyone know if Yamaha makes that engine or does some other company make it? I bought a Tohatsu 9.8 a few years ago and found that Tohatsu makes the Merc and Yamaha 9.9; ergo my question.
  10. R

    Mercury Fuel line Clamp Removal/Install Tool

    Is there a tool to remove and also install the pictured clamp? Thanks, RickM46
  11. R

    Yet another Merc 40 2 Stroke 4 Cylinder won't idle.

    I have a 1992 Merc 40 2 stroke 4 cylinder I have owned since new with WMA carbs that ran great 4 years ago; now, it won't idle. Has been in the garage for 4 years and not used. When I last winterized it, Stabil in gas tank, fogged it, drained the carb float bowls, filled the float bowls...
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