Smothing you may not want to try with your 4-107 or 4-108

[INCOMMUNICADO]

Let me start by saying Incommunicado is on a trailer at my home.When I got home from the work I had to do Monday,about noon I decided to do some piddling on the boat.Where to start,I think I will run the engine check for any kind of leaks.So I connected the water hose to the raw water inlet,not a big deal for years I have done this to flush the salt water side of the system.I would let the engine run with fresh water while we cleaned up and took stuff off the boat.OK now the hose is hooked up and turned on.I am checking fluides,transmission ,colant ,V-drive,engine oil then I discovered a leak in the new transmission oil cooler fitting.While tightening the fitting I here water running.Where is it coming from I start looking oh crap water is coming from the air breather,I'm thinking this isn't good.I hurry down the ladder shut the water off.Climb back into the boat sat looking at the engine where to start.Remove valve cover ,exhaust hose connect remote starter button.I do understand water will not compress.Well if I just bump the starter I might be able to force the water out the valves.Wrong.On my second bump it locks up.Off comes the rocker arm out comes push rods thinking I could manually open the valves and let the pressure off I could open the valves but it didn't seem to release the pressure.Next out come the fuel injector's,sounds simple enough.Injectors that have in the same place for over 1400 hours are not in a hurry to change there location.After several hours trying not to brake more .stuff and using up my profanity allotment for the week I said enough piddling for the day.Tuesday morning no piddling I have a job to do.Monday before I quit I sprayed a small lake of PB blaster around the base of the injectors Tuesday morning the lakes were still there(not good).But with a 1 inch socket breaker bar and cheater handle and a pry bar they came out.While I have them out I take them to Injector shop to be reworked.From here

[INCOMMUNICADO]

Sorry, It wouldn't let type anymore.I reinstalled push rods rocker arm covered the head with a plastic sheet and bumped it over.Water shot every where but it pumped the water out.Then sprayed break cleaner in injector holes turned engine over until nothing more came out.Then sprayed wd-40 in all cylinders then pumped out.Reinstalled redone injectors after an hour and a half of cleaning injector ports and top of the head.Put every thing back together adjusted valves New valve cover gasket crush washers.Start engine it runs just fine.Now back to piddling I did find two small water leaks and a diesel drip five minuets to fix.The moral of this drawn tale is don't put 50 PSI of water pressure to your raw water inlet.

[barrylab]

I think the rule is don't put pressurized water into the inlet. I now run water into a bucket that I put the inlet hose into. That way the only time water is flowing into the exhaust is when the engine is turning. It's also a good idea not to turn the engine over for too long without it starting. Water backs up in the lift muffler and floods the exhaust manifold. I won't mention how I learned all these great tips though, it's too embarrassing.

[Randy]

I've  flushed with a garden hose for short periods just to prime the raw water system after changing hoses, etc. Note to self: Do not get distracted

[graemek]

glad to hear it turned out OK,you probably have but if not might be a good idea to change the oil and filter

[RayNWanda]

 You were lucky that you didn't bend a connecting rod. It should have been OK if it was running. This was basically the same event that barrylab and others have experienced. I have an engine sitting under my carport that was flooded through the exhaust with seawater and then allowed to sit. If you are putting water in the raw water side, it will come out the exhaust mixing elbow. If there is no exhaust gas to push it out, the exhaust system fills up and the engine is at the bottom of the hill. This is the achilles heel of a water lift exhaust system. On the bright side, you probably cleaned most of the carbon out of it...

Do change the oil and filter. Some of the water leaked through the rings.

This is one of the things I like about our Prout. The exhaust leaves the little Yanmar headed straight down about 24" into the muffler. Then out the end of the muffler and through the transom and flapper. I'm not going to say it's flood proof, but it's darn close.