New to me bCrownline with problems high idle water in oil!!!!

[cableguy1979]

If there is anyone in the Chattanooga area that boats and happens to know big block boats I sure would appreciate some help, I would like to put the boat on a scanner for any codes and technical help to getting her right and maybe making her faster.

I just bought a 1996 Crownline 225 CCR with the 454 Mag and it needs a lot of love the engine was fully open to the elements when I got her.....First of all it took me all day to get it running. The guy I bought the boat from I happen to know him for a long time and I'm very familiar with the boat. It hasn't been run in a couple of years but he told me he went out to the boat to check on it after quite some time to find out it has lots of water in the boat while sitting on the trailer in the outdoor elements. Something clogged the drain in the bilge and water filled the boat up till it reached the cuddy. The fuel tank filled with water because of a missing screw in the sender unit. He drained the tank and boat and couldn't get it back running right and decided to sell it because it needed so much but he assumed it still had water in the gas tank

I brought her home and began to long process of fixing her up and I couldn't get it to fire for nothing but finally found out that the entire fuel system had lots of water in it. I took off the lines and blew each one out with a air compressor on 25 psi through the Schrader valve and from each line on the VST tank and so forth. Once I got fresh gas all the way to the injectors she fired off in half a turn but it runs at 1600-1800 rpm and was steady. I don't see any vacuum lines off and I haven't been able to run the boat long enough for it to warm up to full operating temp because the sea pump was missing on the boat so running water through it was impossible. On top of that it has a Bravo drive with ONLY the lower pickup...no side pickups.... so I cant use a regular water hose without a special muff for the nose cone. BUT it does run which made me happy!!! What type of problems can make a 454 Mag EFI run so high at idle? I know its not the throttle cable...I checked. Could there be more water in the fuel systems causing this or wouldn't that make it stumble instead? IAC shouldn't make it run that fast? Maybe since the battery was disconnected so long its having to relearn? Clogged injector?

The other problem I found was water in the oil...probably a quart or so over so my happiness was short lived but the guy did tell me it had no problems when he sat it up so my thought was maybe water got in from one of two places.....the dipstick tube or the flame arrestor and past the rings. There was some light rusting on the plugs but no water in the cylinders. If there was water in the fuel it might explain that rust on the plugs but there was no standing water in any of the cylinders. Has anyone experienced water getting into the oil from a filled bilge and if so how high did it make it in?

 

[Bondo]

Ayuh,.... Welcome Aboard,.... You can just plumb yer garden hose, right into the hose that comes Outa the missin' raw water pump, to feed the motor for testin' purposes,....

Regardless how it got there, ya gotta pump out the water in the oil pan,...
It's the 1st thing to get sucked up, 'n fed to the motor by the oil pump, Then oil,....
Get the oil, 'n filter changed, before ya do anything else,...

 

[alldodge]

but it runs at 1600-1800 rpm and was steady.

Motors been wet and sitting for a long time, without testing I would still think a vacuum leak of the IAC. Disconnect the small line going to the fuel pressure regulator and connect a vacuum gauge to it.

Also check the throttle body to see if the butterfly is fully closing

 

[cableguy1979]

Anyone got a particular recipes to plumb in a garden hose to the raw water line?

I'm a little poor on the tools i need like vacuum tester, fuel pressure gauge and a scan tool but ill rent most at autozone. I did remove the oil pan plug and will leave it open for a few days.

Where is the fuel pressure regulator on this engine?

I could really use service manual 16 if anyone has an electronic version?

 

[cableguy1979]

I need to find out the best way to clean out the fuel lines vst fuel rails and so on.

 

[alldodge]

The regulator is under the plenum is item 15 in link below
http://www.mercruiserparts.com/bam/subassembly/31810/2336/10

To clean the VST, you should remove the screw holding the top and remove it with care. If done without tearing the O rings you can re-install. The O-rings can be had if needed.

Fuel pressure from Autozone and the test port is item 13 in link above

Vacuum fuel pump test may also be rented but cost under 20, here is one at HF for 13
https://www.harborfreight.com/fuel-pump-and-vacuum-tester-62637.html

 

[Scott Danforth]

pull the drive, put the hose in the hole, secure with duct tape

 

[cableguy1979]

that's a great idea....i already have lower removed so I'm gonna see if it can be done through the upper.

 

[alldodge]

Anyone got a particular recipes to plumb in a garden hose to the raw water line?

Easy, remove the hose from the transom and clamp the hose inside the hose leading to the pump.

Or remove hose off the raw water pump and attach to pump inlet.

Or get a tube deep enough to cover the inlet and prop, keep water running in tub as motor runs to replace with cooler water

 

[Rick Stephens]

I would recommend, like AD mentioned, removing the top off the VST, but also, don't clean fuel lines, just replace them. Getting the fuel tank perfect is the harder part as long as the fuel lines are new.

 

[Bondo]

pull the drive, put the hose in the hole, secure with duct tape

Easy, remove the hose from the transom and clamp the hose inside the hose leading to the pump.

Or remove hose off the raw water pump and attach to pump inlet.

Or get a tube deep enough to cover the inlet and prop, keep water running in tub as motor runs to replace with cooler water

Ayuh,.... Don't think that'll work,.... The op says the raw water pump is Missin', on a Bravo,.....

 

[alldodge]

Ayuh,.... Don't think that'll work,.... The op says the raw water pump is Missin', on a Bravo,.....

OK, this also means there is no low pressure fuel pump feeding the VST. The VST does not have sufficient power to pull all the fuel up it needs

Without the pump, can connect the hose directly to the thermostat housing.

 

[cableguy1979]

The pump housing is missing but the pulley is there and pumping the fuel pump. How can i hook the house to the therm?

 

[alldodge]

The pump housing is missing but the pulley is there and pumping the fuel pump. How can i hook the house to the therm?

Where does the transom hose go to?

You have the fuel pump section but not the water pump side?

 

[cableguy1979]

I was refering to the comment about hooking the water hose to the thermostat housing. I am looking for a way to hook my water hose to the motor so i can run it. I guess ill just buy the stupid nose cone muffs for lower only pickups.

Correct the sea pump housing has been removed but the fuel pump amd pulley are intact. Apparently someone was going to replace the impellar.

 

[alldodge]

I would install the housing and impeller. If the pump housing is gone, sure wonder how they have the hose routed from the transom to the thermostat housing. Using a nose cone is nice but unless you have real good water pressure you may not get enough. That said, connecting it straight to the thermostat housing would supply all the water the motor should need for test