93 Evinrude.. "Smokey"

[jvaccarino]

Well, I've got a 93 evinrude..and it's smokin like a sob. Oil and gas mix is automatic... Spark plugs are new, oil line is fine, I unplugged it from the outboard and pumped the ball, oil spills out fine... I guess that just means from the oil tank to the engine, the line is good.. from there?? The spark plugs that were removed did seem to have an unusual amount of oil residue on them.. I had the carbs rebuilt probably a year ago... I've tried carb cleaner, if this helps.. Any input would be helpful. Thanks

Little history about the outboard: Bought used 2 years ago. Boat prior to my purchase sat in a yard, unused for quite some time. I took over, rebuilt carbs, had engine flushed (water was in gas tank).

 

[jvaccarino]

Re: 93 Evinrude..

Re: 93 Evinrude..

Anybody?

 

[tashasdaddy]

Re: 93 Evinrude..

Re: 93 Evinrude..

tell us more about the engine. 93 what. what have you done to trouble shoot. have you check spark, compression, when were the carbs and vro last serviced. is it a vro 1 or vro2. has it ever been decarbed?

 

[jvaccarino]

Re: 93 Evinrude..

Re: 93 Evinrude..

Compression and spark are good. The engine runs fine, the only problem is the AMOUNT of smoke that is produced. Yes I know 2 strokes smoke, but this is excessive.. It's more like a tire burnout when I run the engine..

Decarbed?? Only thing I've put in the mix is Sea Foam to "clean" the engine.

I don't know what VRO1 and 2 are.

 

[Dhadley]

Re: 93 Evinrude..

Re: 93 Evinrude..

Start with the basics. What motor are we talking about?

They didn't use VRO pumps in 1993, they were OMS pumps. But we need to know what motor you have to offer solid advise.

 

[fireman57]

Re: 93 Evinrude..

Re: 93 Evinrude..

jv, tashasd and Dale are two of the best here. What they are basically asking is do you have a tank that injects oil on your engine? If you do are you also premixing your fuel. Don't do both. If you are not premixing they can help you figure out what is going on but they have to know exactly which engine it is.

 

[jvaccarino]

Re: 93 Evinrude..

Re: 93 Evinrude..

ok.. Oil and gas are mixed automatically. The engine is a 70HP OMC 2 stroke.. I am not premixing the fuel... I've noticed the ball on the oil pump is constantly hard.. is this normal? I've been trying to search for other threads with "engine smoke" and the only fix I've seen is people saying to adjust the levers.. where are these "levers?"

 

[Dhadley]

Re: 93 Evinrude..

Re: 93 Evinrude..

Ok, you've got the big bore 56 cid 3 cylinder with oil injection. The excessive smoke can come from several things. One of the most common things is the pump has a hole in the diaphram and over-oils. At least it's not under-oiling as all the rumors would have you believe.

As for pumping the bulb, that will do it too. That forces more oil into the system and you can actually rupture a diaphram. Once the oil bulb is firm when installed, you shouldn't have to ever mess with it again unless you run the oil tank dry. Or remove it for cleaning etc.

Now, what plugs are in it?

Another thing is a fuel restriction. If the fuel line is pinched or clogged somewhere, the pump will sense that and deliver more oil.

 

[jvaccarino]

Re: 93 Evinrude..

Re: 93 Evinrude..

Plugs are some cheap 5 dollar ones from the local auto store.. When I first bought the boat, I drained all the oil, pulled the tubes and pumped all the oil out.. Once the tube is removed from the outboard, the bulb can be pumped, and oil flows freely with each pump. I took the boat out of the garage this weekend and lubed everything.. ran it for a bit, saw that it was still smoking.. I checked the boat in the garage, and there is oil on the floor below the lower unit.. leaking out of the exhaust?

 

[tashasdaddy]

Re: 93 Evinrude..

Re: 93 Evinrude..

1st put real champion plugs in it. they like champion, is it oil on the garage floor of the crap leaking from the exhaust. water carbon mixture. sound like you have a hole in the diaphram, fix that then do a decarb, to get the curd out of the engine. rather than buying deep creep seafoam, you can use regular seafoam, in a spray bottle to spray into the carbs, until it almost stalls. here's a link to help you.

http://forums.iboats.com/bbBoard.cgi?a=viewthread;fid=36;gtid=1035563

 

[jvaccarino]

Re: 93 Evinrude..

Re: 93 Evinrude..

How would you fix a hole in the diaphram?

 

[jvaccarino]

Re: 93 Evinrude..

Re: 93 Evinrude..

Are you talking about a carb diaphragm or fuel diaphragm??

 

[tashasdaddy]

Re: 93 Evinrude..

Re: 93 Evinrude..

Ok, you've got the big bore 56 cid 3 cylinder with oil injection. The excessive smoke can come from several things. One of the most common things is the pump has a hole in the diaphram and over-oils. At least it's not under-oiling as all the rumors would have you believe.

As for pumping the bulb, that will do it too. That forces more oil into the system and you can actually rupture a diaphram. Once the oil bulb is firm when installed, you shouldn't have to ever mess with it again unless you run the oil tank dry. Or remove it for cleaning etc.

Now, what plugs are in it?

Another thing is a fuel restriction. If the fuel line is pinched or clogged somewhere, the pump will sense that and deliver more oil.

Dhadley is talking about the oil pump, that pumps the oil, into the fuel. hole in the oil pump diaphram. you are getting too much oil. thus, carbonizing your engine,

fix the oil pump, then do the debarb, to clean out the excess carbon, the oil, and excess carbon are what smoking.

 

[jvaccarino]

Re: 93 Evinrude..

Re: 93 Evinrude..

Gotcha.. The oil pump is just the hose with a bulb to the fuel pump? I drove by the local marina here.. and they recommend buying a whole fuel pump repair kit.. costing somewhere around $300.. are they trying to rip me?

 

[iwombat]

Re: 93 Evinrude..

Re: 93 Evinrude..

A nice page on VRO pumps. Look at the diagram and you'll see what diaphragm they're talking about.

http://continuouswave.com/whaler/reference/VRO.html

 

[jvaccarino]

Re: 93 Evinrude..

Re: 93 Evinrude..

Right, the oil pump is part of the whole fuel pump.. Do I need to replace the WHOLE fuel pump is what I am asking.. Or am I able to disassemble the unit and repair JUST the diaphragm?

 

[iwombat]

Re: 93 Evinrude..

Re: 93 Evinrude..

I think there are rebuild kits available, but I'm no expert on VROs.

 

[tashasdaddy]

Re: 93 Evinrude..

Re: 93 Evinrude..

after investigation. looks like the oil side of your pump is unrebuildable.

http://www.maxrules.com/fixomcvro.html

 

[tashasdaddy]

Re: 93 Evinrude..

Re: 93 Evinrude..

ok, start, a new post, " 93 rude 70hp fuel pump, oil side rebuildable" explain that we've believe the oil side is shot. i will get the attention of the better than me.

 

[jvaccarino]

Re: 93 Evinrude..

Re: 93 Evinrude..

As I am reading the VRO site that was posted, I'm understanding the pump better.. Although I don't want to buy a $300 pump. I want to say that the last owner put a new pump in before I bought the boat.. I think I am going to investigate more... I was thinking that maybe the fuel filter is clogged, or the line has an air leak.. BUT.. would I still be able to run at full RPM with a "fuel restriction?"