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  1. M

    idle setting in lake?

    my 7.5 merc 79-80, starts and runs good in a barrel. When in the lake it is hard to start and keep running. I learned from an earlier post that this is due to the idle setting that must be set in the water.<br /><br />Is there a way I can get the setting close so when i get to the water it...
  2. M

    runs out of water not in water

    Finally fixed all problems . . . I thought.<br />in a bucket my merc 79-80 7.5hp runs great. Today i put in in the lake and it kept stalling at idl. It would not even stay running if i gave it gas.<br />it would continue runining if i pumped the bulb.<br /><br />when I pulled it out of water...
  3. M

    is there a thermostat

    I can't find where or if there is a thermostat on a 79-80 7.5hp merc
  4. M

    Not overheating- weak telltale-help please

    I installed a new pump I have a week telltale stream. took to motor in the tech said the pump was installed right and was working fine.<br /><br />Got home and started it up and it still had a week stream, but does not seem to get hot.<br />What to do?<br /><br />Also motor runs well and starts...
  5. M

    79-80 merc weak telltale-Pump?

    I installed a new pump I have a week telltale stream. took to motor in the tech said the pump was installed right and was working fine.<br /><br />Got home and started it up and it still had a week stream, but does not seem to get hot.<br />What to do?<br /><br />Also motor runs well and starts...
  6. M

    Took it to a marine shop. . . still the same ...HELP

    I have a 79-80 merc 7.5. Will start with 4-6 pulls the runs good but stalls at idle. What can I do?(compression is also good)<br /><br />Also, replaced pump 1 month ago. Little water comes out the tail tell. tried blowing through it ect. Still the same. The guy at the shop said That if it is not...
  7. M

    won't idle, overheat?

    I have a 79-80 merc 7.5. Will start with 4-6 pulls the runs good but stalls at idle. What can I do?(compression is also good)<br /><br />Also, replaced pump 1 month ago. Little water comes out the tail tell. tried blowing through it ect. Still the same. The guy at the shop said That if it is...
  8. M

    will not idle/ overheat?

    I have a 79-80 7.5hp merc that starts with 4-6 pulls then runs good but will not idle(stalls).<br /><br />It also has very little tail tell water comming out. The boat place said that does not mean it is not pumping water. It does not seem to be be getting hot. Is this ok. I did replace the...
  9. M

    impeller fit in pump

    I just go a pump kit for a 79-80 7.5hp merc.<br /> Every thing seems o.k. except I had to rotate the impeller to get the blades to fit in the pump.<br />should it fit this tight?
  10. M

    pump kit 80-81 merc 7.5hp

    I have a 7.5hp merc. sn 5817652<br /><br />i need a pump and impeller. it looks like i need the whole pump and impeller. i also need the part that the water tube fits into at the top of the pump.<br /><br />I know there is 2 drive sizes.<br />I was able to get the part number off what was left...
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