2005 Merc 25hp 2stroke tiller throttle

Discussion in 'Outboard Maintenance' started by trplsevenz, Nov 26, 2013.

  1. trplsevenz

    trplsevenz I Love microskiff.com!

    Is there a way to throttle these engines without shifting them into gear? It's a new to me engine, and I can't seem to find any info on a way to disengage the shifter, that still allows you to increase RPM's when it's cold.
  2. HaMm3r

    HaMm3r Well-Known Member

    There's a knob on the front to increase/decrease idle speed. It's labeled "Pull to Prime" but if you twist it it adjusts the idle as well. Looks like this...


  3. trplsevenz

    trplsevenz I Love microskiff.com!

    Awesome. I knew it had to be hiding in plain sight. I wouldn't have ever thought of that. I'll try it when I get home today. Thanks!
  4. Rookiemistake

    Rookiemistake Well-Known Member

    Well that explains it.didnt know it was twistable
  5. HaMm3r

    HaMm3r Well-Known Member

    Wow, this is actually funny! I wonder how many Merc owners there are out there that never realized that the knob is an "all-in-one" design, just like the tiller.  ;D

    In truth, I remember figuring it out by accident too, many years ago. It bothered me that the writing wasn't right-side-up, so I tried to spin it and noticed that it did more than just rotate.

    Oh, and one more thing, just so you know - The throttle adjustment isn't instantaneous like with the tiller. It'll take a couple of seconds after you turn it for the change to take affect.
  6. bw510

    bw510 I Love microskiff.com!

    Lol. I had no idea
  7. PG350

    PG350 I Love microskiff.com!

    Not to change the subject but I am missing that knob on my motor that I have not got to water test yet. What are the starting procedures using the knob? Do you just pull it out once then pull the cord or do you pull it and push it back in multiple times?
  8. HaMm3r

    HaMm3r Well-Known Member

    The official instructions in the Mercury owners manual says to pull it once and leave it until the motor is started. However, I and many others have found it helpful to "pump" it two or three times then leave it out. There is a lever on the inside that depresses a primer button when the knob is pulled, so I think that's why it starts easier with several pulls.