After fresh plugs, clean gas, clean carbs, and carbs synced, the engine idles fine but seems to load up at slow speeds, as though the mixture is too rich or oil fouling.
The oil injection system was disabled by the p.o. and I've been premixing at 50:1.
I was told that the injection system is designed to meter the oil at a lower rate at low speeds (somewhere in the 100:1 range) and at a higher rate at high speeds (somewhere in the 50:1 range). I've also been told that Johnson triples from this era can be finicky when it comes to low speed operation.
Could this be the problem - too high an oil ratio at low speeds causing loading/fouling?
This engine never runs at sustained high speeds - mostly puttering around at or near idle speed.
Question to folks out there with disabled oil injection systems:
Has anyone run their premix at 75:1 without adverse effects?
Thanks!
The oil injection system was disabled by the p.o. and I've been premixing at 50:1.
I was told that the injection system is designed to meter the oil at a lower rate at low speeds (somewhere in the 100:1 range) and at a higher rate at high speeds (somewhere in the 50:1 range). I've also been told that Johnson triples from this era can be finicky when it comes to low speed operation.
Could this be the problem - too high an oil ratio at low speeds causing loading/fouling?
This engine never runs at sustained high speeds - mostly puttering around at or near idle speed.
Question to folks out there with disabled oil injection systems:
Has anyone run their premix at 75:1 without adverse effects?
Thanks!