My son and I have a 218 that we payed $20 for. It needed some help due to a leaky old battery. I was able to replace the battery holder and solenoid. I then checked the wiring diagram in the Greenberg repair manual to the engine. Everything looks ok. I still can't get any sound. I tried a battery directly to the horn, it works but is a little weak. I tried the adjustment; it seemed to help a little. I put the horn back in the engine and no sound at all. Any advice for my next step would be appreciated!
Eric
