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ContinuousWave: Whaler Performance
Johnson 90: Fuel injection; oil injection
|Author||Topic: Johnson 90: Fuel injection; oil injection|
posted 08-31-2001 11:44 AM ET (US)
The Johnson Web page say that the oil injection system on the Johnson 90 mixes the proper ratio of oil with the fuel just before delivery to the carbs. Suppose I am out trolling for 1/2 hour and the carb bowls are now full of an fuel to oil ratio of something like maybe 12:1. All of a sudden, I take off and accelerate to WOT. The oil injection system is going to increase the oil ratio to maybe 50:1 but until I run the previous gas out of the carb bowls, the engine will be running the 12:1 ratio when it really needs something like 50:1.
This doesn't sound good. Surely this would shorten the life of the engine. What am I missing here?
posted 08-31-2001 01:51 PM ET (US)
Nope! at idle you will be around 100:1 maybe 150:1 on certain engines(less oil). By the time you nail the gas and get on plane the bowls are empty of old mixture. Disconnect your fuel line and see how long, eh short it lasts.
posted 09-01-2001 03:20 PM ET (US)
Johnson went to all carb engines. Quick start just gives a shot of gas and increases the timing for an easier startup. My 99 Johnson 90 has quick start and 2 carbs.
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