Saltwater sitting in bilge - bad results! Why?

ehallda

Cadet
Joined
May 18, 2004
Messages
7
Hi boaters~ FYI, I have an 87 18' Bayliner with a 3.0L OMC I/O.<br /><br />I went on a successful fishing trip in late September and upon return, cleaned out the boat and covered it. We thought we might use it again before winter, so we left it. ~6 weeks later, I decide I should fog it since I won't be using it after all. But, it won't start.<br /><br />The battery was found dead - so we charged it. Yet, the engine still wouldn't budge. I opened up the engine compartment and notice the bilge is full of salt water - when I pulled the plug after the fishing trip, something apparently blocked the drain hole and prevented it from draining. The water was just below the bottom of the engine, but not touching the engine. So I drained it, and washed it out thoroughly with fresh water.<br /><br />Now, a lot of time has passed, the engine compartment is dried out, and the battery charged. There are two notable problems:<br /><br />1. The engine won't turn over at all. It looks like the starter is spinning inside, but unable to spin the engine.<br /><br />2. The outdrive won't lift - when I try to raise/lower, I get nothing.<br /><br />My question: would salt water sitting in the bilge for 6 weeks, in a closed compartment, have such a detrimental affect? I do notice /some/ new corrosion, mostly on the alternator. I would think boats sitting in the water year round would always have water in their bilges...<br /><br />And finally, should I have it taken care of now by a pro, or can I wait till Spring without damaging anything? It isn't fogged, but the fuel tank is almost full (we have mild winters here, dropping below freezing only 2-3 times in winter). I'm not in a position to pay for much, so I'd like to protect the engine in the meantime and do it myself if possible. Heck, I can't even raise the outdrive to trailer it anywhere...
 

wvit100

Chief Petty Officer
Joined
May 6, 2002
Messages
416
Re: Saltwater sitting in bilge - bad results! Why?

Maybe some of the wires were in the water and the connections are corroded. Can you jump around the wiring to the tilt/trim motor and get it to run? The blue wire should make it go up, the green wire down. There may be a black ground wire or it may be grounded through the case. <br /><br />The starter may have some rust that is keeping the starter gear from moving up the shaft and engaging. If that's the case you might be able to free up the gear but you will probably need a new starter soon.
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Saltwater sitting in bilge - bad results! Why?

It sounds like the reason the engine won't start is the bendix is rusted up on the starter shaft. The starter motor runs but the bendix will not engage. That could be because the flywheel was in the water and would splash salt water onto the starter while the engine was running. Pull the starter and have a look and have the starter checked out and if it's bad, replace it or have the old one repaired if it's not too corroded.<br />Regarding your trim/tilt pump, that could be a number of things. You could have a faulty fuse holder, corroded connections, bad grounds etc. You will need a service manual to follow the wiring on the system.<br /><br />Here is something I put together once about winterizing that might help you decide rather you want to try the winterizing yourself or not.<br /><br />Winterizing your boats engine and drive is a lot of work. Not doing it or doing it improperly WILL be very expensive to fix , and that is also a lot of work. <br />Plan on giving yourself the full day to winterize your boat, and don't wait till the last minute to do the job. As difficult as winterizing can be, doing it when it's 35º outside, snowing or raining, windy and in the dark is not something you want to do.<br />Read and think about everything you are about to do before you start, and plan for it. Tools, parts, helpers, (oh yea) even if just to hand you stuff and talk with you. Make a checklist if it'll help.<br />All set? Here we go.<br /><br />Before you start the engine, add fuel stabilizer to the fuel tank. If possible, put in the stabilizer on the last trip of the season and top off the fuel tank before you get to your driveway or where the boat will be stored. This will allow the stabilizer to mix completely in the tank.<br /><br />You do have your Service manuals for the engine and drive handy, don't you? <br />If not you are looking for trouble.<br /><br />A few things you will need to have:<br />Get all your parts together before you start. Filters, gaskets, o-rings, seals, etc. <br />Note: (Gaskets, o-rings, and seals are not reusable, they may look like it, but they are a one time use item.)<br />Look at your manual before hand and know what types of grease, oils, lubes, gear lube, sealers, fogging oil, etc. you are going to need and have them on hand and ready.<br />Have the tools needed to do the job. Including filter wrenches, alignment bars etc.<br />Plenty of rags and oil absorbent pads<br /><br />1. Run the engine on muffs. This will do several things. Warm and mix the oil for changing, and flush the cooling system if you have been running in salt or brackish water. <br />2. After running, change oil, filter.<br />3. Change fuel filter/s, be sure to check the contents of the filter. If there is around a 1/4 of the contents water, you should drain the water out of the tank. (That won't be covered here) <br />4. Check the antifreeze level and be sure it's in the proper temperature range. -35 degrees is a normal 50/50 mix of antifreeze and water.<br />5a. Remove the Outdrive. (Mercruiser, OMC, and Volvo DP-S and SX)<br />Check ALL the bellows. if any of them look weather cracked or seem excessively stiff or weak, replace them. A leaky u-joint bellows ruins gimbal bearings and u-joints and drives if allowed to keep leaking.<br />On Mercruiser, OMC, and Volvo DP-S and SX style drives check the engine alignment (If you are going to do your own work, you MUST have an alignment bar) <br />5b. For those with the Volvo 270 through 290 style drives. Remove the upper gear box and check the bellows and u-joints. The bellows are not as strong as the Merc and OMC bellows so replace them every couple of years just to be safe. If they go bad, you must pull the engine to change the intermediate bearings in the bell housing. Be sure you don't loose the shims between the upper gear box and the intermediate housing.<br />6. Check the gimbal bearing. Does it turn smooth? if not replace it. Check the u-joints do they feel smooth also? Any catches indicates they are worn and should be replaced. If ok, grease the zirks or pull the plugs (if equipped) and lube them. <br />7. Was there any gear lube in the bellows when you removed the drive? If so, the input shaft seal is leaking and should be fixed before reinstalling the drive.<br />8. Drain the gear lube from the drive and refill per manufacturers specs. ALWAYS use new gaskets and o-rings on drain, fill, and vent plugs and dipstick fittings and plugs, along with new gaskets and seals for mounting the drive back on the boat. Don't forget to remove the gear lube monitor (if equipped) and clean it. The gear lube will form sludge in the bottom after a couple of years. Clean it yearly and you won't have a problem.<br /><br />NOTE: For those with Mercruiser Alpha drives. If you are planning on changing the impeller, now is the time to do it. Since you must remove the lower unit to get to the pump, no reason to put in new gear lube till it's done. <br /><br />9. Remove the prop and check for any fishing line around the prop shaft (very common problem, even for those that don't fish), clean and grease the shaft with a good quality marine grease prior to reinstalling the prop. Any kind of grease is better than none at all. And if you remove your prop yearly, you should never have a problem with the type grease you use. <br />(DO NOT use Neversieze) it may be great for cars, trucks, tractors etc. but in the boating business we call it "Eversieze".<br />If you notice nicks, dings or bends in the prop blades, now would be an ideal time to send the prop out to a prop shop for repairs.<br /><br />10. Reinstall the drive per the manual. (new gaskets and seals, right???)<br /><br />11. Check the batteries, is the acid level where it should be? Are they fully charged? A low charged battery can freeze and crack and make a very big mess.<br />Terminal ends clean and greased.<br /><br />12. Start the engine, make sure the oil filter doesn't leak, fuel filter doesn't leak and the drive still shifts and run it till it warms up. All ok, GOOD, shut it off. Now it's time to make it safe for cold weather.<br /><br />13. Start by using something like Salt-Away to clean and flush salt and minerals from the system along with a corrosion inhibitor for cooling systems. This will give you the corrosion protection you need while the cooling system and manifolds are dry for the winter.<br />NOTE: Using Salt-Away and a corrosion inhibitor eliminates the need to use anti freeze in the raw water side for corrosion protection. It's safer and easier to use than antifreeze, but it MUST be drained out after use because it Will freeze, just like water.<br />Now run the engine for a while so the Salt-Away is throughout the cooling system, and get ready to fog the engine. Bring the rpm up to around 1500 rpm and start squirting fogging oil into the carb till the rpms drop and you are getting a lot of smoke out the exhaust. Then shut off the engine. If the engine diesels, restart it fog some more, make sure the idle is very low and shut it off again. You don't want water backed up into the cylinders from running backwards.<br /><br />14. Disconnect the water and muffs and allow the water to drain out of the drive. Now get your manual and remove every drain plug on your engine, manifolds, coolers, heat exchangers, water pumps, and anything else that could have water in it. drain the anti-freeze side of a closed cooling system. Look at the book and make sure you have them all removed. Look around, missing one could cost you an engine block. Get a small screwdriver and probe inside every hole you remove a plug from. Make sure there is nothing blocking the water from getting out. Be sure the engine is also as level as possible so as much water as possible is drained out. Some of the coolers for oil and power steering can be drained by removing a hose easier than removing the plugs<br />Put all the plugs back in and hoses back on.<br /><br />15. Spray your favorite corrosion blocker on everything (except fiberglass). This includes battery terminals. Turn the steering so most of the rod is extended, make sure it's clean and spray it with a light oil, turn it back and forth a few times spraying in between so it's well lubed. <br /><br />16. Store the boat with the bow up and the drive down. If the drive is up the exhaust part of the drive behind the prop can fill with water, freeze and crack.......Not Good!<br />It's also a lot easier on the u-joint bellows to have it in the down position.<br /><br />17. Shut off (Better yet, disconnect) the batteries. Tag the cables and wires so you know where to put them back in the spring (trust me on tagging them).<br /><br />18. Don't forget the rest of the boat, this is only for the engine and drive. There is still the domestic water system and the head to deal with
 

DHPMARINE

Captain
Joined
Dec 16, 2003
Messages
3,688
Re: Saltwater sitting in bilge - bad results! Why?

ehallda, I think you have a serious corrosion problem.Any water almost up to the engine is bad,salt worse.6 weeks covered only adds to the problem.Not all boats sitting in water have water in them,and if they had this much,they'd also have your problems.<br /><br />I'd get another starter,or rebuild yours.Stabilize the fuel,run the motor and fog it.<br />Drain the gearcase and refill it,do all the winterizing you can.<br /><br />You can raise your drive manualy by cracking open the lines on the tilt cylinders.Messy.Tighten them up again after blocking up the drive.Check your trim pump first,a few had a release valve to do this.<br /><br />Beyond this I'm not sure except wait till next year.Your motor should be okay,as well as the fuel system.Electrical is a grab bag,but it will deteriate over the winter,nothing you can do.See what next season brings.<br /><br />DHP
 

Solittle

Fleet Admiral
Joined
Apr 28, 2002
Messages
7,518
Re: Saltwater sitting in bilge - bad results! Why?

I'd check for worst case first by pulling all the plugs and see if you can turn the motor over with a socket wrench or breaker bar by hand. That will tell you if your motor is truely "frozen." If it turns freely you could probably get by with doing as much winterizing as you can and tackeling the starting problem later. If it is truely "frozen" you need to act as it will only get worse.
 
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