as I mentioned before, I suggest two oil changes. I still found water in the oil after the first one. Not much, but you don’t want any, especially if you are laying it over for the winter.
Marek From: Russ & Melody via CnC-List Sent: Thursday, October 22, 2015 1:29 AM To: cnc-list@cnc-list.com Cc: Russ & Melody Subject: Re: Stus-List Hydrolocked! Hi David, you are lucky, insomuch as these yanmar engines are very durable. An attempt to start this cold engine if it is hydro'd is unlikely to bend a con rod. Being compression start it must have a couple of compression cycles to develop enough heat to fire the first cylinder. No glow plugs is simple and a benefit in this case. Item 1) = good news Item 2) don't fret about the time to get back. It's something you have no control over. As I said, these engines are durable and the internals are coated with oil... that's good. right? I suggest the following: a.. drain the oil & replace with a few litres of cheap stuff (you don't need a bunch a additives for this stage) b.. close raw water inlet c.. operate the decompression level and bar the engine over by hand d.. if you don't feel any "humps" after a while the okay to proceed to bar engine using decompression & starter (45 second intervals & 1 minutes rest, max 10 times) e.. wait 15 minutes and repeat with application of WD 40 spray into intake (WD 40 is light and has fish oil, better than PB Blaster for this) f.. open raw water intake g.. start engine normally using decompression h.. warm up in gear to normal operating temperature (30 minutes or more @ 2000 RPM) i.. shutdown, wait 15 minutes and drain oil j.. change oil filter & refill with preferred oil At 01:01 PM 21/10/2015, you wrote: Well this is a crappy way to end the season. Short story is, I'm 99% positive that I managed to get water in the cylinders in my Yanmar 3GM30F, and now have a hydrolock. Thankfully, the engine was not running when it happened, but I *did* attempt to crank the motor with the starter a couple of times before I realized what had happened. So now, I'm worried about significant damage from two angles: 1) Bent rods/crank/pistons? I'm inclined to think that the starter motor doesn't have nearly as much torque as the engine operating under normal load, so I'm hoping that my attempts to crank didn't permanently do any damage such as this. Thoughts? 2) Time: Unfortunately I can't get back there with tools and equipment to attempt to rectify the hydrolock until Sunday, which means the engine will have been sitting there with water in the cylinders for almost 4 days. It's mostly fresh / brackish water (boat's on a mooring in a river mouth). Chances of corrosion in the cylinders requiring a teardown? Anyone have any experiences with hydrolocks they'd care to share? Ugh... -------------------------------------------------------------------------------- _______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
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