Re: 71/2hp evinrude

[jerry-ahrens]

Could be one of several things. How much oil do you run in the gas for your motor? That one should be 16/1. Running at 50/1 will wear out the motor rapidly resulting in low compression. Stuck rings from carbon build up can also be a problem, or maybe after lots of hours, it is time for a rebuild. You may want to try a different compression gauge to verify your readings. With compression that low it should’t idle very well at all. Hope this helps..