1974 115 hp evinrude

[ROBERTSEXTON]

I have a 115 hp evinrude 1974. It starts up fine and idles high. when I give it throttle in forward and reverse, the engine dies, what could be the problem?

 

[ezeke]

Re: 1974 115 hp evinrude

First, there are the requisite compression test and spark test.​

Then, though there is a dearth of information to work with, start with as complete as possible a cleaning of all of your connections relative to the ignition. That means disconnect, thoroughly clean and reconnect. Be especially careful with the ground wires. Examine the ignition coils for any signs of heat damage such as cracks or discoloration.​

You may wish to attempt to observe the engine running in the dark to see if there are arcs. Also make sure that your spark plug wires are not close to other wires.​

 

[tashasdaddy]

Re: 1974 115 hp evinrude

i say dirty carbs also.

 

[Thomas Baker]

Re: 1974 115 hp evinrude

Hello

You might want to check to see that your engine is advancing the timing as the throttle is moved forward. When throttle is advanced the timing should also advance with it. The linkage may be warn or unhooked under the fly wheel. Make sure all 4 cylinders are firing and the engine is not missing. Most of the time ignition coils can be cracked but usually does not cause a problem with operation. Their are many types of sealers that can be used to fill small cracks in ignition coils. If they are cracked you should seal them to keep out the moisture. Good luck
Thomas

 

[ezeke]

Re: 1974 115 hp evinrude

To Thomas Baker: You may not have noticed that your advice is about a year and 4 months late.

The ignition coils on the 1973-1977 V4 engines were set high on a metal rack where temperatures as high as 200 degrees F were common along with consequent long term damage to the potting material and casing.

If the engines were not functioning properly, signs of overheating was often one indication of a possible cause and certainly worth investigating. Covering the cracks on ignition coils does nothing to repair existing damage. It is well established that failing ignition coils can damage powerpacks.