Running out of water

JKEP44

Petty Officer 2nd Class
Joined
Jun 11, 2005
Messages
110
I have a simple question. Can you run a 1988 Mercruiser 5.0 litre 4valve (305 chev) out of the water for test purposes, and if so how do you keep it cool?
 

Richard Petersen

Senior Chief Petty Officer
Joined
Dec 17, 2004
Messages
778
Re: Running out of water

Do not do that until you really understand how to do it alone. OR You will ruin the engine.---------------------We can not teach you on the web. NO WAY. Hands on training by someone local only.
 

JKEP44

Petty Officer 2nd Class
Joined
Jun 11, 2005
Messages
110
Re: Running out of water

Thankyou very much for the info. When I start it I will have it in the water. I do need to know one thing though. Where does the engine get its water from? I am afraid that the line may be plugged as the boat was full of wasp and dirt dobber nests when I got it.
 

jeff13601

Chief Petty Officer
Joined
Apr 30, 2005
Messages
593
Re: Running out of water

Down low on the sides of the drive, just above the prop you will see a vent on both side where the water is sucked into the drive. The impellor draws this water in from the lake and to the engine. Never run your boat without water. It only takes a few seconds to do in the impellor and not much longer to fry the engine. You need to buy a set of muffs to go over these intakes at the bottom of the drive. The muffs hook up to a water hose. Cyclops is right when he says it would be good to have someone show you so you dont make a mistake and do damage
 

jlinder

Lieutenant Junior Grade
Joined
Jul 5, 2004
Messages
1,086
Re: Running out of water

KEP,<br /><br />You really want to get some hands on guidence from someone who knows. The good news is that there are a lot of folks out there who would be happy to show you, and it is not that hard.<br /><br />To help your curiosity and answer your questions, when you want to run it on land you use a set of muffs. These are rubber suction cups that connect to a garden hose and slip over the outdrive (assuming this is an outdrive).<br /><br />The water is sucked up through a grill, or openings, located at the bottom of the drive. Inside the drive is an impeller pump that pumps the water up from the lake through the engine.<br /><br />Also, you never run the engine with the drive tilted up. I suspect you might have an OMC, perhaps a cobra. The shifting is done at the bottom of the drive. As a result the shafts are always turning, and you don't want to put strain on the gimbal.<br /><br />It also sounds like the engine may have been sitting for a while. In any case you should ask yoursel a number of questions. How long since it has been run? Was the engine winterized before it was stored? When was the last time the impeller was changed?<br /><br />If it has been a long time since it has been run you will want to check a number of things. If the impeller is old you will want ot replace it. (If you have the OMC cobra drive it is easy). <br /><br />Don't be discourged. It may sound like a lot, but it's not that bad. A boat takes maintenance, and a little effort. But the maintenance you put in before you get on the water will repay you with fun on the water.<br /><br />Give us more details. How much experience do you have? What make/model is the stern drive? How long since it has been run, etc. Be specific, don't worry about too many details. The more you give the more accurate your answers will be.<br /><br />Just take your time, ask your questions, and get someone to show you if you are confused.
 

jeff13601

Chief Petty Officer
Joined
Apr 30, 2005
Messages
593
Re: Running out of water

He has an 88 mercruiser. What the heck is a dirt dobber nest? lol
 

olbuddyjack

Petty Officer 1st Class
Joined
Oct 23, 2003
Messages
318
Re: Running out of water

What the heck is a dirt dobber nest?
Bees Christopher Robbin, you never can tell about bees... -Winnie the Pooh
 

Limited-Time

Vice Admiral
Joined
Mar 30, 2005
Messages
5,820
Re: Running out of water

Dirt dobber = mud wasps They build nests (tube shaped) out of dirt.
 

JKEP44

Petty Officer 2nd Class
Joined
Jun 11, 2005
Messages
110
Re: Running out of water

Hey thanks for the help! It is good to finally get a positive responce. I don't really know that much about boats but I am very mechanically capable and am certified on engines,trannys, and hydraulics from John Deere so dont be afraid to tell me how it works. As for what I have I the only info that I know is that the engine is a 1988 mercruiser 5.0 (looks like gm 305), the outdrive (stuff outside the back of the boat) says OMC Cobra on it, and the boat its self is a 1988 bayliner capri 2150. It has been sitting for about 1 year and 4 months (or so I am told), I have checked the distributor, changed plugs and wires, turned the crank by hand to make sure it was free (all was well), removed and tested the starter (new one on the way, and rebuilt the old one) pulled the air cleaner to check for mice, and changed the oil. If there are other things that may need attention (such as fore mentioned impellor) PLEASE let me know. Thanks again for the help.
 

JKEP44

Petty Officer 2nd Class
Joined
Jun 11, 2005
Messages
110
Re: Running out of water

Oh, one more little thing, I have about a full tank of not so hot smelling gas (looks like about 35gal). Does anybody know an easy way to get that out other than syphoning?
 

jeff13601

Chief Petty Officer
Joined
Apr 30, 2005
Messages
593
Re: Running out of water

I forget who said this earlier. You need to get some clear 5 gallon plastic jugs. Syphone the gas into them and put them in the back of your truck. Take your truck to a shady part of town and leave it their and someone will steal the gas. Saves you 4 dollars a gallon to recycle it.
 
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