Re: Runaway diesel engine

Posted by Walt Davies on March 02, 2007 at 17:17:09 from (72.173.58.4):

In Reply to: Runaway diesel engine posted by Laborie on March 02, 2007 at 10:29:00:

I was engineer on the small boats on the ship they all had 6/71 Grey marine engines. (same as GMC or Detroit but made for marine use)
The one thing we were always scared of was run-a-way we ran them at 2600 RPM except in battle then we ran them at 2900 RPM just a few RPMs below run-a-way speed which is 3000 to 3100 RPM.
You had to be real careful when running these old GMC engines. They would suck the oil right out of the crankcase at speeds over 3000 RPM. Even a brand new one would do that. Later on I worked on a big amphibious vehicle that the army had it had 4 6/71 engines on it. we had to run the rack before we started them and get them all setup correctly. Then we ran them for 4 hours down river to set the RPMs you did this by watching the temp gauges if they ran hot back it off if cold set it up a bit till they all ran the same temp.
Boy you learn a lot working on this military stuff.
Walt

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