Results 1 to 4 of 4
  1. #1
    Join Date
    Aug 2012
    Location
    Huntsville, TX
    Posts
    1,213
    Rep Power
    100

    Fuel System Cleanout

    The '96 125 Merc I've been running as the main motor on the Stratos for the last couple years had recently been running pretty crappy at low RPM and would die when shifting in gear at the end of the day while bunkin the boat. I've been bad with this boat, not running any additive to fight ethanol. It's been running well, so why mess with it?

    I finally had it after working Raven which is an idle only, no wake lake. The poor Merc was choking when trying to run at low RPM for any time. It was jerking & misfiring so much I knew it had to be putting stress on the bearings.

    At the suggestion of a good friend (Karnie), I grabbed up one fresh gallon of premium gas & a 16oz can of Seafoam.
    I ran the motor on that mixture out of a 2 gallon gas can until it ran out. I ran the idle RPM between 1400 & 900 for most the time. 900 was about as low as I could get it previously. After about 45 minutes I realized I could start getting a lower idle. After about an hour and a half I could get an idle of 600-700 (spec at 675 +- 50). Not long after the fuel mix ran out. It still has it's rough spots but it seems to be heading the right direction. I shifted in & out of gear both forward & reverse (no load of course, it's on ear muffs) and it was working pretty dang good. It was smokin quite a bit but I expected that with the additive being so rich.

    During the process I listened to the internals of the 125 with a long screwdriver as a stethoscope, sounds pretty tight. No knocking or slapping sound on idle or rev. Gotta believe the core it working pretty well. On the downside, I noticed the voltage regulator was rather hot, running about the same temp as the cylinder head. I'll have to look into that because I recently replaced the regulator.

    All in all, I'm pretty happy with the time & money spent. It seems to be running better than when I started and I'm feeling more confident in the motor.

    If anyone is having rough running motor at low RPM, I suggest doing this. Pretty cheap & gets results. If you are having rough running at higher RPM, this may not help, it addresses the the idle circuit up to about 2000 RPM. That's about the max RPM you want to run while on the hose (ear muffs).

    Thanks for reading...
    Karl

    ~~~~~~~~~~~ Wishin I Was Fishin ~~~~~~~~~

  2. #2
    Join Date
    Aug 2012
    Location
    rye tx
    Age
    71
    Posts
    767
    Rep Power
    225
    good info karl........glad ya getting the bugs out!!!!!!

    flags and handlebars should never touch the ground!!

  3. #3
    Join Date
    Aug 2012
    Location
    Huntsville, TX
    Posts
    1,213
    Rep Power
    100
    Seemed to have. I'll be running Seafoam & premium in the next 5 or 6 tanks to see if it can't avoid a day of carb rebuilding

    ~~~~~~~~~~~ Wishin I Was Fishin ~~~~~~~~~

  4. #4
    Join Date
    Aug 2012
    Location
    Huntsville, TX
    Posts
    1,213
    Rep Power
    100
    I was looking for an additive measuring funnel and this one looks like "the one", if anyone is interested
    Hopkins FloTool 10704 Spill Saver Measu-Funnel


    I also found I can get SeaFoam by the gallon for about $52 at O'Reilley's (list price). That breaks down to $6.50 a pint. I'll be adding an ounce per gallon for a while & see how it turns out.

    Once I get it running correctly I'll probably start using Biobor EB. Been hearing good things about it & 1 oz treats 15 gallons so it's fairly economical as well.

    ~~~~~~~~~~~ Wishin I Was Fishin ~~~~~~~~~

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •