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Question about idling a 1955 271 |
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heron
Silver Level Joined: 01 Dec 2012 Location: Chattanooga, TN Points: 109 |
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Posted: 28 Sep 2016 at 9:24am |
Quick question: I know the Detroits don't like low rpm but does it hurt the motor to low idle it or when sitting is it better to keep it at a medium idle. I've always heard to never low idle it, as fuel will leak into the cylinder but I wanted to make sure.
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ac_sd
Silver Level Joined: 23 Apr 2011 Points: 194 |
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No prolonged idling of the "71 Seies" or other 2cycle detroits ! They will "load up" and start spitting oil !! The manuals all recommend letting temperature stabilize at a high idle and then shutting them down ! Navy used them in everything and abused the heck out of them with tremendous reliability, but they didn't idle them very much other than to bring them up to temperature !
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heron
Silver Level Joined: 01 Dec 2012 Location: Chattanooga, TN Points: 109 |
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Okay, so don't let it low idle but if needs to idle just keep it about midway...that is what my dad always said but if I'm walking the machine, up and down on a low boy or trying to get it into a tight place a high idle is too fast...hence my question. Thanks much for the reply. This motor has always run like a top. At a lower idle it's smoother than my duramax.
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wfmurray
Orange Level Joined: 13 Sep 2009 Location: Bostic NC Points: 1225 |
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In trade school they said to let the engine surge instead of idle smooth. Keeps engine from getting to cool.
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Dan73
Orange Level Joined: 04 Jun 2015 Location: United States Points: 6054 |
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The Detroit we had couldn't get out of it's own way unless it was opened up good then heaven help you she would walk off pulling the world behind her. But yes don't idle it we got in alot of trouble with people doing that waiting for the chopper to finish a load.
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Coke-in-MN
Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41485 |
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Engine idle is a choice - I did but kept it up higher to be sure oil pressure was in operating range - big thing is if you are leaving machine set running do so with transmission in neutral and clutch engaged as the brass bushing in the clutch housing will be carrying the weight of the bearings and throw out levers unless you do .
There are grease zerks on the brass but even so the unit wears
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ac_sd
Silver Level Joined: 23 Apr 2011 Points: 194 |
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If a 2 cycle Detroit is loping or "surging", the governor is not adjusted correctly !! idling it for short periods (loading the machine) won't hurt anything !
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