Re: Distorted/leaking thermostat covers

Home › Forum › Ask A Member › Distorted/leaking thermostat covers › Re: Distorted/leaking thermostat covers

May 13, 2015 at 4:18 am #15843
johnyrude200
Participant
    quote t2stroke:

    Removing material around the outside surface only will make the casting dig into the thermostat and warp it at the screws. Just something else to think about when you are dealing with this irritating part.

    Dan in TN

    On top of that, the reason why I didn’t respond to ‘doubling up gaskets’ is for the same reason you cited…is only a band-aid to the situation instead of a solid long-term solution.

    I don’t remove thermostats because I’ve learned, the way you and the veteran techs did 30 years ago, running a motor without a thermostat is simply a band-aid for a weak impeller or faulty cooling system. I have observed in the last 50-60 motors I’ve serviced that basically 60-70% of motors I acquire either are like this or simply have faulty cooling systems. It’s to the point where I think I may raise my resale prices across the board by $30 to account for a new thermostat and impeller (I don’t count my troubleshooting time as part of this figure) and explain this on my sales page.

    When you say material around the outside surface, are you saying lapping that t-stat cover is a futile cause? This seems to happen at least 80% of the time when I remove a cover after seeing a motor run too cold, or overheat, despite seeing plenty of water being expelled at the blubber hole or telltale, or just chasing down the cooling system problem (thanks again Frank R. & GARY, for sharing the trick about the impeller housing pin hole which can basically shut off all water to the rest of the motor…can anybody say INVALUABLE and NOWHERE in any manual I’ve ever read).

    Now just wait until I become a PIA for all the 80’s through 2004 25/35hp motors I am diving into currently….

    Thanks again for all your help folks…as I said last week, have a local FD asking me for a 18hp evinrude, which I guarantee you will look and run like a showroom motor once I’m through with it to insure reliability when trying to save drowning victims….wouldn’t be possible without the devotion of you retired mechanics and service reps to the AOMCI and the forums.