[capnward]

My Atomic 4 was built in 1974, as near as I can determine from the serial numbers. It was rebuilt in the early 80's, and again in 2001, at 2488 hours. It has a mechanical tachometer/engine hour meter, driven from the accessory drive near the distributor. I assume the hour meter was new with the engine. I don't know if the meter was ever reset before I bought the boat in 1994. If not, total engine hours since new are 4360. Hours since last rebuild are 1872. I put 150 hours on it this year, 200 last year. Fresh water heat exchanger, Indigo electronic ignition, oil change every 50 hours. No oil filter. Will start changing oil every 25 hours. No thermostat, instead have a thermostatic mixing valve next to the heat exchanger. New plugs, cap, rotor, impeller every year. Marvel Mystery Oil in gas and oil. Engine seems to be doing fine. Just installed a new starter, and adjustable main jet.