Where to start... 1975 Merc 115.

[William_Munny]

I've searched all the posts and haven't found anything basic enough, so I called my dealer and he tells me "They don't work on anything that old." So, here I am, begging for help...<br /><br />Here's my story... This engine has always run fine. I bought it new in 75. The only thing I've ever had to replace is the fuel pump diaphram. It probably has less than 300 hours on it. Last time out, I was just mushing back to the ramp at about 1/3 throttle. Suddenly, it just quit; no coughing/sputtering etc. It quit so abruptly that<br />my son asked if I had turned the key off. Started it up and it ran smoothly for about another three hundred yards and quit again. One more try... same thing.<br /><br />We got it home, checked all the plugs/spark etc. Everything looked fine. Ran it in the driveway for about twenty minutes and it quit again; same way.<br /><br />Can someone tell me where to start? I'd really like to get in a little more fishing<br />before I croak.<br /><br />Thanks in advance,<br /><br />"One day, you'll all be old... Hope you'll be better at it than I am."

 

[steelespike]

Re: Where to start... 1975 Merc 115.

Hey Oldtimer, Im an old timer too.First you need to get a service manual. Grubbs Marine at www.old mercs.com has reprint owners and service manuals for your motor.Sounds like it could be some sort of ignition problem.Might be as simple as a contact in the ignition switch. Try wiggling <br />the switch to check.It may be making partial contact and after a while it gets hot and quits.<br /> Your dealer isnt much of a dealer if he cant or<br />wont help you.Three years ago my dealer, at the time he did evinrudes, replaced the impeller in my 1965 Merc.No guestions asked. You may want to try to find a real dealer. <br /> Good luck.