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Old 30 January 2012, 16:18   #1
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Country: UK - England
Town: Devon
Make: AVON SUPER SPORT 3.4
Length: 3m +
Engine: YAM 25, YAM 30
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Yamaha autolube 30 hp or pre mix?
Yamaha auto lube 30 hp, is there any good reason for removing the auto lube system and running pre mix 2 stroke? Are these auto lube systems reliable or need particular maintenance attention?
Cheers!
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Old 30 January 2012, 16:22   #2
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Country: UK - England
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Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
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Never had any trouble with mine. Will be fine if well maintained.
Can't say the same for some others.
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Old 30 January 2012, 16:46   #3
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Most autolube systems meter the oil to help avoid fouling the plugs with extensive idling. Then increase oil delivery as RPMs increase. Straight pre-mix is a compromise.

If you carry oil aboard (and you should) if the premix system goes wonky you can just add some to your main fuel tank to get home.
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Old 30 January 2012, 17:04   #4
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Cheers captnjack, thanks for the advise!
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Old 30 January 2012, 20:29   #5
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Quote:
Originally Posted by eliott View Post
Cheers captnjack, thanks for the advise!
You're welcome. Oil injection systems are fairly reliable anyway. Maybe one of the mechanics on here can comment on how many they see fail, but its probably pretty small compared to all the other bits which go tits up on a boat.
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Old 31 January 2012, 08:40   #6
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Country: UK - Scotland
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I've run both premix and automix.

Curently on premx - and I can't hang around at idle for long before things start to oil up!

+1 to Cap'n Jack's spare oil advice.
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