S.L.O.W. which models?

S

schematic

Lieutenant Junior Grade
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Jan 12, 2008
Messages
1,102
Hi Gents

Can anyone tell me which models are equipped S.L.O.W.

Thanks
 
C

Chris1956

Supreme Mariner
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Mar 25, 2004
Messages
27,158
Re: S.L.O.W. which models?

My '98 Johnny 150V6 has it. My guess would be 90s Johnnys and newer. at least the V4 and V6 models.
 
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Cricket Too

Lieutenant Commander
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May 14, 2003
Messages
1,732
Re: S.L.O.W. which models?

My '97 Johnson 115 doesn't have it. I've overheated at WOT and it doesn't slow itself down.
 
S

seahorse5

Rear Admiral
Joined
Jan 24, 2002
Messages
4,698
Re: S.L.O.W. which models?

The SLOW sytem first came out on certain 1988 motors. It was not on every carbureted motor.

There is also the SAFE system that limits rpm to 1200 on 2002 and later FICHT, DI, and E-TEC engines.
 
S

schematic

Lieutenant Junior Grade
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Jan 12, 2008
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1,102
Re: S.L.O.W. which models?

When a overheat occurs, and the engine is shut down by the operator, if the operator attempts an instant restart, will SLOW affect idle quality and starting, or does it only intervent when its specific RPM is reached?
Does it kill cylinders randomly, or always picks on one specific cylinder?

Thanks
 
C

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,158
Re: S.L.O.W. which models?

On my V6, the SLOW system kills spark to one bank of three cylinders. They stay killed until motor cools off.
 
S

schematic

Lieutenant Junior Grade
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Jan 12, 2008
Messages
1,102
Re: S.L.O.W. which models?

Thanks Chris
I can now presume that a 3 cylinder would pick on the same cylinder when in SLOW. That would explain why an 3 cyl. with a one low compression cylinder wouldn't restart after overheating...

Thanks
 
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