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  1. J

    Opti 175 constant alarm

    I have a 2006 Optimax 175. I am getting a constant alarm after the motor is running for awhile and goes down to an idle but goes away when I throttle up. Thought it was the water pump and installed a new one. Still getting the alarm. Last season it got new thermostats and new temp sensors. There...
  2. J

    Reinstalling head on an Opti

    I reinstalled the head on my 2006 Optimax 175 and as I do more research I realize that I didn’t put oil on the head bolts, I just cleaned them and I used the old bolt. They are torque to yield. Will this cause me any problems down the road? Should I take everything apart and do it again a...
  3. J

    Stripped plug hole

    Went to change the plugs today on my 2006 175 Optimax and it’s been sitting without plugs for a while. I put the first plug in and it was tight to go in and I figured it was due to the weather. The second plug started tight again but by the second or third turn I knew something wasn’t right. I...
  4. J

    Single continuous guardian tone on 2006 mercury optimax

    I have a 2006 Mercury Optimax 175 and when the motor gets warm after taking it for a ride and I come down to an idle I'm getting a single continuous tone from the guardian system. The tone goes away if I throttle up and I no longer have the tone until I come back down to an idle. I started...
  5. J

    Spun a hub?

    So I had some trouble installing the lower unit on a Mercury Thunderbolt 115 after replacing the water pump. I was unable to find the correct gears. I put the lower unit back on correctly and the propeller spins as it's supposed to (F N and R) hooked to water muffs. I took it to the lake and it...
  6. J

    Mercury 115 Thunderbolt lower unit

    I have a Mercury Thunderbolt 115 6 cyl, and I went to install a donor lower unit and when I originally put everything together I had Forward gearing in the Reverse position and it would not shift into the forward position. I reinstalled the lower unit and now I have reverse gearing in the...
  7. J

    Mercury Thunderbolt 115

    So I have a Mercury Thunderbolt 115. The motor ran great until I melted a piston. I replaced the Powerhead with a donor motor and kept the lower unit the same. Now I am unable to get water to come out of the Powerhead when running in water. When I use water muffs, water runs through without a...
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