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  1. 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
  2. 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...
  3. 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
  4. 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...
  5. J

    2001 Mercury 6 hp 4 Stroke Won't Start

    Hi. Hope you're well. I have a single cylinder 4 stroke 6 hp that won't even cough. Model ME6M 4ST, serial 0R019810. Compression at 65 psi. Spark jumps 1/4 to 3/8 inch air gap. Fuel spit right into cylinder. Can pull all day and get nothing. It's such a simple engine. Would timing have...
  6. J

    2005 Yamaha 50 4 Stroke Poor Water Flow at Telltale

    Watching the thermostat housing temp with an infrared thermometer I could predict when the alarm was going to blow; when I saw about 190 degrees. I ended up splitting the T at the tell tale and blowing compressed air separately into each line. On the power head side, air went all the way...
  7. J

    2005 Yamaha 50 4 Stroke Poor Water Flow at Telltale

    I have changed the impeller because of this problem resulting in no significant improvement. I have yet to try compressed air. I plan on removing the intake manifold and tracing that water line upstream, junction by junction. I can use the compressed air along the way. I found an exploded view...
  8. J

    2005 Yamaha 50 4 Stroke Poor Water Flow at Telltale

    Hi. Long time. Hope you're well. Working on a 2005 Yamaha, model T50TLRD, serial 6C2L 1000653, that just dribbles water from the telltale. Flow improves with a pipe cleaner shoved up the telltale but you can only get up there 1 1/4" before hitting a T. One side of the T comes from the engine...
  9. J

    Mercury 35hp leaking.

    Sounds like you need to trace the water flow from the tell tale hole on back through the system. Initial thought is that water outlet isn't hooked up and cooling water is exhausted into the engine compartment. Do you get water peeing out the tell tale hole? Check engine block side covers for...
  10. J

    Impeller Replacement - Among other things

    Another thought. In going after the impeller you may also want to order a replacement drive key in the even you drop or lose the lose the original. Item 23 on parts list exploded view, 28.8M0032837, Key. Again, $4 peace of mind. J
  11. J

    1983, 9.8 hp, Firing One Cylinder Only

    CDI Electronics used to give access to an on line troubleshooting guide that was great. It looks like you have to pay for it now. $50.00. Ugh.
  12. J

    Impeller Replacement - Among other things

    1 For this model it looks like the fuel filter screens are within the fuel pumps attached to the carburetors. 2 Not sure about the grease on the lower unit. Clean it all off with some old gas and watch for new leak tell tales. Might be a sign that that the lower unit is leaking but...
  13. J

    Impeller Replacement - Among other things

    Couple things: First, run a thin wire up the water telltale hole vigorously a few times. Sometimes insect eggs or small debris gets trapped and blocks water flow making you think the impeller is shot. Do this before you tear down the lower unit. Second, if you're in the lower unit for the...
  14. J

    1983, 9.8 hp, Firing One Cylinder Only

    Hi. Been a while. Hope you're all well. I have a 9.8 hp, that appears to be a 1983 with serial 6403333, which is firing on one cylinder only. I swapped the coils to find that they are both good. So I think my problem is either a bad switch box (power pack) or a bad signal coming into the...
  15. J

    1997 Force 120 Leaking Fuel

    Hi. Been a while. Hope you are all well. I'm working on a 1997 Force 120 (serial unknown at this time). It's a 4 cylinder 2-stroke. I'm trying to keep it from stalling when shifted. During carburetor adjustments I noticed raw fuel coming out the front of the lower carburetor and fuel...
  16. J

    1981 20 hp Needs Prop

    I spun the prop on my 20 hp and don't know what to order. The only numbers stamped into the original are 9P A4. The diameter measures 10 1/4". Can someone point me in the right direction for pitch? Does the 9P indicate 9 inch pitch? Thanks. J
  17. J

    Water Pressure Gauge

    Hi. This is a new-to-me Sundancer Designer 200D with a water pressure gauge as part of the instrument array. What water pressure would this be monitoring? Where is the sensor? Thanks, J
  18. J

    1980 20 hp 5608805 Needs Drive Shaft Housing Engine Mount Covers

    Hi, Can anyone identify the part number for the round snap-fit mount covers for the lower engine mounts on the drive shaft housing? Thanks, J
  19. J

    US Marine L-drive Main Relay Access / Replacement

    Hi. i'm trying to replace the main relay on a US Marine L-drive. The bracket holding the electrical stuff including the main circuit breakers and main relay looks like it is held by two clamps. I removed the front clamp bolt and water started flowing in. I freaked out and reinstalled the...
  20. J

    US Marine / Force L-drive Main Relay Replacement

    I need to replace the main relay on a US Marine L-drive. The main relay is on a sheet metal bracket along with the main circuit breakers. I found this bracket is clamped to the floor, I think in two places and when I removed the bolt on the first clamp water started to shoot out of the bolt...
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