Results 1 to 9 of 9
  1. 09-19-2017, 08:47 PM #1
    MikeBelter
    MikeBelter is offline
    Member
    Join Date
    May 2015
    Location
    Reidsville, NC
    Posts
    131

    Broken thermostat bolt on Opti

    Was inspecting my thermostats and a couple tough turns when I was tryin to put it back in (I know, I know shouldn't have turned it when it was tough) broke a bolt off in the port thermostat of my 2015 225 Pro XS. Got the bolt out with a vise grip thankfully. Am I going to have to get a special bolt or can I just use the same head and threads on a stainless bolt from the hardware store? Tried the other fresh bolt in the same hole just to see if it was stripped or damaged and the bolt goes most of the way in then gets stuck within about 1/8" or less of being all the way down. I know these are 1" bolts that have 1/2" of threading that actually gets screwed in.
    Reply With Quote Reply With Quote
  2. OldTimer57
    OldTimer57 is offline
    Member
    Join Date
    Nov 2016
    Location
    Birmingham AL (Pelham)
    Posts
    1,507
    #2 09-19-2017, 10:21 PM
    Just chase the threads with the correct tap and you should be good to go. Never hurts to put a bit of anti-sieze since the bolt is steel and the head is aluminum.
    2008 Bass Cat Pantera Classic
    2014 Mercury Pro XS 200
    Reply With Quote Reply With Quote
  3. rchavis
    rchavis is offline
    Member
    Join Date
    Nov 2008
    Location
    Raleigh NC / Falls Lake
    Posts
    11,210
    #3 09-20-2017, 01:03 AM
    Its a M6x25 bolt > # 82130025
    Reply With Quote Reply With Quote
  4. MikeBelter
    MikeBelter is offline
    Member
    Join Date
    May 2015
    Location
    Reidsville, NC
    Posts
    131
    #4 09-20-2017, 05:14 AM
    I think the bolt is an M5...takes an 8 mm head. M6 takes a 10 mm. Correct me if I am wrong
    Reply With Quote Reply With Quote
  5. Savage
    Savage is offline
    Member
    Join Date
    Jul 2004
    Location
    Penn PA
    Posts
    15,186
    #5 09-20-2017, 06:41 AM
    Get the bolt from Mercury, and tap threads with "Alumtap", or "Tap Magic".


    Reply With Quote Reply With Quote
  6. MikeBelter
    MikeBelter is offline
    Member
    Join Date
    May 2015
    Location
    Reidsville, NC
    Posts
    131
    #6 09-20-2017, 08:21 AM
    If I want to retap the hole (last 1/8 inch is blocking me on a 1.0 screw, can I just remove the set screws from the plate that holds the hose in on top of the fuel rail and pull it straight out to move it out of the way a little bit for my tap?
    Reply With Quote Reply With Quote
  7. Savage
    Savage is offline
    Member
    Join Date
    Jul 2004
    Location
    Penn PA
    Posts
    15,186
    #7 09-20-2017, 09:40 AM
    Yes, but tape over the hole in the fuel rail before tapping.


    Reply With Quote Reply With Quote
  8. MikeBelter
    MikeBelter is offline
    Member
    Join Date
    May 2015
    Location
    Reidsville, NC
    Posts
    131
    #8 09-20-2017, 10:32 AM
    Ok will do. Thanks
    Reply With Quote Reply With Quote
  9. hooken203
    hooken203 is offline
    Member
    Join Date
    Feb 2007
    Location
    Waterloo Iowa
    Posts
    3,774
    #9 09-21-2017, 11:47 AM
    Sounds like you may have something in the bottom of that hole. I would take a small pick and poke around in there and blow it out with air then go at it with your tap. I have been in this situation many times on different engines. The best advise you can get is take your time.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »