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  1. J

    2006 60 ELPTEFI Spewing Fuel from Vapor Separator Vent

    Hi. Hope you're well. Got a symptom that's new to me. 2006 60 4 stroke EFI. I am having raw fuel spewing through the lower cover from the vapor separator top vent. What does this mean? Thanks, J
  2. J

    Mercury 35hp twin 67-69 got hot and shut down

    No thermostat on this engine? Get yourself an infrared thermometer (they're cheap now) and watch the head temp as you run. Shut it down as you approach 190 F. Three options for the water pump: failed completely, partially failed or good. If it's partially failed it'll fool you. You'll see...
  3. J

    1998 25 EL Piston Ring Identification and Availability

    Hi. Hope you're well. I am working on a 1998 25 EL, serial 0G614644, that suffered a minor overheat and jammed a piston. The piston is a little scuffed but not bad at all. Very little aluminum in the cylinder. Anything there can be taken off the cylinder wall with a mild acid. The rings got...
  4. J

    2003 Mercury 25 hp 4 Stroke Coil to Plug Wiring

    I was recently looking at a 2003 25 hp 4 stroke that seemed to be low on power. On this engine, a single coil pack supplies power to each cylinder. I noted that the top coil output wire went to the top cylinder's spark plug and the bottom coil output wire went to the bottom cylinder's spark...
  5. J

    Boat not getting up to speed

    When looking at spark, be sure to look at spark plug output / performance, not just coil air gap performance. Coil may look fine on a tester but the plug may not be transmitting that energy. Don't assume the plug is working. Not that this has burned me before, ... NGK ... Are coil to plug...
  6. J

    Lund Rebel 1650 Leaking

    Great ideas! As always, thank you. J
  7. J

    1972 merc 110 Blue Stripe hood, Ser# 3267158 Exhaust/Steam? coming out taletail

    Before your drop the lower unit, try pushing a wire up the tell tale. Insects love those small dark holes. I can't tell you how many times I've seen this prevent a water pump job. J
  8. J

    Lund Rebel 1650 Leaking

    Hi. I have been slowly bringing back a Rebel 1650 with a Honda 50, 4 stroke. Good news: it was given to me as partial payment for a job. Bad news: it was given to me as partial payment for a job. The engine seems firm. I have gone through it and last time out it started and ran very strong...
  9. J

    2001 Mercury 6 hp 4 Stroke Won't Start

    Just went to school. Found the ignition coil putting out great spark. Jumps a 3/8" air gap. Then attached the spark plug, grounded it to the engine block and observed there is NO spark. The plug is flat out bad. NGK. Replaced with Champion. Fired right up. Found the SAME THING with the 5...
  10. J

    Trigger not snug on 2000 40HP Mercury S/N-OG590000 and above

    Not sure I understand your post. Your post title implies you have serial number 0G59XXXX but when asked to verify you mention serial number 0T339XXX. Be sure you are using the correct parts list. J
  11. J

    Mercury 350 35hp stator

    True. No stator. Point, condensers, magnetos. Set points to 0.020". Loosen and scrub condenser connections. Odd to lose both cylinders' spark simultaneously; many parts. Can you take a picture of the numbers or the engine? Is there an aluminum welch plug in the engine block with numbers...
  12. J

    Trigger not snug on 2000 40HP Mercury S/N-OG590000 and above

    Need the serial number off your engine to be sure. Please provide. J
  13. J

    2001 Mercury 6 hp 4 Stroke Won't Start

    Excitingly, I received another one of these engines yesterday! 5 hp version with capability to run off internal or external fuel tank; model 1FX5201HK, serial 0R433254. Same initial symptom. Compression at 60. Has spark. Fake the fuel delivery. Just won't ignite fuel. Not even a cough. What...
  14. J

    2001 Mercury 25 Timing Belt Change, Pulling Flywheel

    Thank you. I shall try one. J
  15. J

    2001 Mercury 25 Timing Belt Change, Pulling Flywheel

    Thank you. Seems like a pretty neat device. Are these zingers more effective than the typical 3 bolt puller? This thing is really stuck. J
  16. J

    johnson 2006 90hp no spark

    dva meter reading is consistent. Changing the scale will change the reading. You are showing 1 when set at 20 therefore higher than 20v. Reading 43.5 when set at 200 v scale; 43.5 volts. Reading 45 when set at 600v scale; 45 volts. Conclusion: you have 44 to 45 volts. No variation problems. J
  17. J

    2001 Mercury 25 Timing Belt Change, Pulling Flywheel

    I'm replacing a timing belt on a 2001, 25ELPT 4S, serial 0T284681. The flywheel is giving me trouble. Can you point me in the direction of a good flywheel pulling instructional? Thanks, J
  18. J

    15hp johnson problems starting after winter

    Be wary of the compression numbers. The gauge could be bad. What are the chances 2 cylinders are gone at the same time? More likely the gauge itself is off. In addition to magnitude, the other thing you want to see from a compression test is the consistency between cylinders. You have that...
  19. J

    Ok I surrender. 2007 9.9 merc 4St

    There's a chance you'll find something on the CDI Electronics site. They used to have a very good troubleshooting resource. J
  20. J

    RPM won't go over 4000

    Unfortunately, the couple exploded views that I use as reference require a serial number as input. Any chance you can get us that? I have seen incomplete travel on the ignition advance. Without knowing your configuration I cannot say that this is your problem. It's just an idea. I mention it...
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