Engine Hour Meter
Engine Hour Meter
I've always fancied an engine hour meter, but always been unable to find the ultimate solution 'Tiny Tach' which fits onto the fuel injection line; anyway its over $100 in its home territory. What about an alternative? I found an electro-mechanical special from Amazon, £14 and a positive/negative terminal arrangement. All it needed was a live feed from the engine and an earth. I thought it probably wasn’t too difficult to find a live feed on the key, I have a Yanmar 3gm30 with the basic ‘3 lights&buzzer’ setup. The feed from the key to the warning lights stays positive all of the time the ignition key is switched on (red/black on the harness), this went to the +ve terminal on the meter. I picked up an Earth off the engine for the -ve terminal. The bracket was from an odd piece of stainless and angled so that I could mount it on a bit of bulkhead and still see the figures. The only fly in the ointment was the plastic case cracked when I flexed the bracket, but sure how many people travel in the engine room?
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