Leaving hose on without engine running

[Walkersteelhead]

Is it possible to get water into the oil if you leave the flush hose on and running for a long period of time without running the engine. I have an older 140 4cyl with a mercruiser 140 outdrive as best as I could tell by the seriel numbers. Thanks ahead for any replies.

 

[rodbolt]

Re: Leaving hose on without engine running

not on that rig unless someting was wrong already.

 

[Walkersteelhead]

Re: Leaving hose on without engine running

Ok I will start the story of my boat. I bought this boat a week ago from a guy I trust. I know him through other people. The motor is rebuilt,it hasn't even been afloat yet. He got tired of the project. I have some things to replave like ther bellows and gimble bearing. He said they have run it with a hose and no oil. They spaced out and left the hose runnin,when they got back water was in the oil. I will check the compression of the cylinders. I have read some on this board about getting a new manifold and riser if they are older. How much do they run. I have worked on cars so am mechanically inclined but I am green towards boat engines. Thanks for the reply.

 

[Fishermark]

Re: Leaving hose on without engine running

He said they have run it with a hose and no oil.

If I am understanding you correctly, if they ran this rebuilt engine without oil - that's a BIG problem! Is that what you meant?

 

[Luna Sea]

Re: Leaving hose on without engine running

This could be a long story then........

 

[Don S]

Re: Leaving hose on without engine running

If they did indead run a rebuilt engine without oil, it's time to pull the engine and recheck the bearings.......they can't be any good after that. Plus the oil pump is also garbage.<br />If you meant there was no water in the oil until they left and came back, that's different. The intake and exhaust manifold are a single item and if the manifold or riser had any holes in them between the water passage and exhaust passage, then the water could get into the cylinders. This wouldn't happen as easily with the engine running because the exhaust would push the water out of the exhaust side.

 

[Bondo]

Re: Leaving hose on without engine running

Even If it was the Outdrive that was run without Oil,.........<br /><br />It Ain't going to be a Pretty Picture........

 

[achris]

Re: Leaving hose on without engine running

I think I'll go and look for somewhere to hide until this one is over....

 

[Don S]

Re: Leaving hose on without engine running

Stick around Chris, imagine what would have happend if he had bought the boat from someone he didn't trust or know through other people.

 

[Walkersteelhead]

Re: Leaving hose on without engine running

Yes sorry there is oil in the motor,what I meant was there was no water in the oil before they left the hose running on it. It doesn't matter much if I have to replace the manifold or riser I got a really good deal.

 

[Walkersteelhead]

Re: Leaving hose on without engine running

I have an 1/8th pipe thread drain I believe on the manifold. Would the air bleed out the outdrive if I pressured the manifold up. Also what poundage should I pressurize it with.

 

[achris]

Re: Leaving hose on without engine running

ok, I'm sucked in!<br /><br />If the engine is all ok, water passage-wise, then you could leave the water on the flushers for a week and you wouldn't get any water in anywhere. With the engine not running, the water pump ain't spinning, and it won't allow any water past. I've run engines without the leg (outdrive) on by just stuffing the hose in the water inlet passage on the bellhousing and left it running without the engine going for quite a few minutes and still no water in the oil. If you have water in the oil, you have a problem, and it ain't caused by leaving the flushers running!<br /><br />To pressure test the manifold, you have to remove the exhaust elbow/riser (upside down 'U' shaped thing at the back of the manifold), cut a piece of wood (or steel) out to block the passages, then pressurize from the small inlet at the front of the manifold. I usually use about 1 bar(14 psi). If that holds, then check the elbow with a nice solid screwdriver. Try punching a hole through it, on the inside. If you can, it's GTG. (Gone to God). Here's the bit that's really going to hurt. If they both check out ok, then you have a head or block problem. <br /><br />Now I really am looking for a nice safe, internet free, place to hide...... <br /><br />Chris...........

 

[Walkersteelhead]

Re: Leaving hose on without engine running

Thanks chris no reason to hide. I am way happy with the boat so not much to stress about. Thanks for the info I will try that. I do have an extra riser.

 

[Laddies]

Re: Leaving hose on without engine running

Jees, I don't weant to start a argument, but a drive with a impeller with a set in it or bad impeller, went hooked up to a pressure hose will let water bypass into the cooling system. So if the water did not get in the oil when the engine was running it probably came from a bad elbow or manifold. If you remove them and seperate them build a plate to cover the elbow hole, with a vent hole in the middle to vent the exhaust chamber, plug the hose fittings and pressurize the manifold thru the drain hole. You will find any leaks in the manifold. Be sure to use a new gasket on the elbow plate. Then inspect the elbow if there are no visable holes or cracks, turn it upside down and carefully pour fuel oil in the water jacket if it leaks it to the exhaust chamber it's the elbow---Bob

 

[rodbolt]

Re: Leaving hose on without engine running

and after pressure testing the manifold shift the tester to the block. cap off the seawater in line and pressurize the seawater out to the manifold line. should hold 15 psi about indefinatly. if it does not start hunting for leaks in the head/block, circulating pump assy.

 

[Walkersteelhead]

Re: Leaving hose on without engine running

Well I found the problem I think. I haven't had this boat long and since I had it it has been pouring. I looked in the oil fill hole and noticed some milky oil on the rocker shafts. I have changed the oil since I got it so it shouldn't be milky I haven't run run the motor since I changed oil. The oil cap was really sloppy. I do have the dog house and the boat cover on it,but we have had alot rain lately. I noticed alot of moisture on vlave cover so water must be getting in somehow. I replaced the cap and changed oil. I ran it for about 20 minutes with water to the outdrive and no milk in oil so far. Thanks for all the great tips.