1990 Johnson 60 HP with VRO removed???

joshua27

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Apr 12, 2013
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I recently acquired a boat with a 1990 Johnson 60 HP Pro Series motor on it. This outboard originally came with a VRO setup which was removed at some point prior to me purchasing the boat. I got the motor to fire over today with starting fluid but it appears that the carbs aren't getting any fuel to them at all. I suspect the shoddy job done in removing the VRO pump is at fault.

I don't have a tank for the boat yet so I had the fuel hose in a gas jug full of premix gas. I figured with the electric fuel pump it should pick it up.

Can someone please check these pics and let me know what I need to do to fix this mess?





 

fhhuber

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Normal method for disabling the VRO is to use the appx 1975 era engine's fuel pump... or just plug off the oil side of the VRO pump and disconnect the oil alarm.

No idea what pump you have there... But first step in testing it is to disconnect it from the carbs, run fuel line back to the supply tank (or a catch can)and turn it on. See if it actually pumps at all..

Then you have to find out how much fuel it can pump vs what the engine requires.

If its not supplying enough then with the setup you have there, the top carb will starve first which would result in catastrophic engine failure.
 

flyingscott

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Is the electric fuel pump working at all it may need to be primed. Pull the fuel line off where it connects to the motor and see if it pumps into a gallon jug. You can also disconnect the fuel line from the motor then get a line with a primer ball and use that. That way you should be able to fill up the carbs to run the motor until the floats run dry. If it was me I would take the electric pump off and put the old style vacuum operated one on. Don't use the starting fluid any more may cause damage to the cyls.
you need to run 50-1 in that motor.
 
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batman99

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Remember to replace the fuel filter (attached to the electric fuel pump) as well. Pump might work great (during simple flow tests) but if its attached filter is plugged, it would be comparable to sucking thick honey through a skinny straw. re: Fuel starvation at engine's upper RPM range. If engine has been sitting a long time, I'd buy / install new carb kits with new jet seats as well. Old gas sitting in carbs isn't good in long run either. While working on the carbs and fuel pump, fog oil its inner cylinder chambers and let sit as well. This helps - after engine has been sitting for a few years.
 
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joshua27

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I cracked the fuel fitting open slightly while the fuel pump was running and there was fuel at the motor. It doesn't seem like it's getting from that point over to the carbs. it also looks funny the way the previous owner deleted the VRO in comparison to the ways i've seen in other photos.
 

batman99

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If you don't trust how the previous owner installed an electric fuel pump and don't trust VRO system on older OMC engines, have a serious look (and in-depth google search) of old technology mechanical Fuel pump using Part number: 438559 or 0438559. If wondering, I recently ordered 0438559 from ebay and when weather is nicer, I plan to install it on my Johnny. Perhaps mechanical pump 0438559 (using pre-mix @ 50:1) is good fix for you as well?
 
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joetheis

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First and for most.......
NEVER use "Starting Fluid" to fire a 2 smoker.
Having raced motorcycles for decades, and spinning wrenches on them, I can tell you it's a no-no.
Gas/oil mix goes into the carbs and is drawn into the crank area of the motor through reed valves.
The piston travels down creating positive psi in crank area.
This pushes fuel/oil mix through windows in the cylinder wall to the compression area, (top of the piston).
That fuel oil mix ALSO lubes the crank, rod, piston pin. (Hence WHY you mix oil and gas)
"Starting Fluid" will wash the oil off a bearing or wrist pin and then you got metal and metal............
If you have to use "Starting Fluid" it MAY be a sign you have low compression, the reeds are worn and not sealing.
IF the motor has been sitting for a long time, the needle valve, (think shut off in a toilet, float drops, needle goes off seat, lets gas in. Bowl fills, pushed needle into seat and shut off fuel feed).
This maybe stuck up and closed, not letting gas/oil in or the jets my need to be cleaned, (gas evaporates and leaves the oil sticky stuff in there, or a white powder from the E in Ethonal gas).
Unless I KNOW the P.O. and KNOW he can do the RIGHT repairs, I NEVER trust ANYTHING they do!!
There is a lot of butchers out there!!!
If the pump is suppling fuel to the carb, it's inside the carbs.
Do the simple cleaning first..... remove the fuel line at the carb.
Spray carb cleaner in the tube going into the carb, maybe it'll free the needle, and get enough in there to clean the jets.
Sometimes it works, something naaaa.
I use "Sea Foam" in my fuel all the time to keep my carb clean.
What I would do?
toss the electric pump, either go back to VRO, (I have a 91 'Rude and my pump is still nice)
or get the older pump and plumb it in, not hard, Lots of info here to do it.
Or take the carbs off and do it right!
Joe
Always take any advice I give with a can of beer er 2!
 
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joshua27

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Ok the electric pump works. It's supplying fuel to all the carbs. I took all 3 carbs off and cleaned them up. I also checked compression and have 120, 125 and 118 psi. Engine was cold when checked so numbers are probably a little off.

It doesn't look like the #2 cylinder is getting fuel sprayed into it. The 1 and 3 cylinder spark plugs are a light brown color but #2 is still silver like when I bought it a couple days ago.

I already checked it for spark and that's good.
 

juno pierrat

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after reading many posts about electric pumps over the years, most senior guys on here don't like them for safety reasons, in case of fire and the pump still running. just say', and by no means am i a senior guy on here
 

racerone

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The older style pumps are ultra reliable.-----Fit one off a 3 cylinder 65 hp " commercial " model.----------Some of those did not use VRO and a simple pump is cheaper and easy to find.
 

AKJETB

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hey josh I personally replaced my vro2 system from my 93 j50jetb 50/35 factory jet. it was a super easy conversion, and you can go find a good marine parts supplier online (is where I got mine) and it shows both the vro fuel pump or the manual/vacuum pump. mine literally bolted right up to the side of the motor. I have pics at home I can send your way later to help out. I can say my motor runs awesome with that new pump.
 
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AKJETB

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that bolt comes out and that was my source of vacuum, and the pump bolted right up.
 

AKJETB

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so this is the fuel pump mounting location, and the fuel pump I used. part#043887
 

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racerone

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AK------Are you sure that there is a spot like that for a fuel pump on a 3 cylinder 60 HP model ??
 

AKJETB

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you know im not 100% certain without a model number, but I would love to do some leg work for him if I got it. I have seen a lot of these vro motors with a mounting spot, but im not 100% on his. I was just hoping to give him an idea of what one might look like. sorry if I was out of place.
 

joshua27

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AK and racerone, thanks for the ideas, unfortunately I don't believe my motor has the same mounting option as yours does. I checked it and didn't find any unused mounting holes or anything. I think that I will have to use a fuel pump similar to yours except that it will have a 3rd hose connection for pulse air from the crankcase. I'm just unsure of where to get the pulse air from. In the picture I posted does it look like the pulse air would come from the brass nipple?

 

AKJETB

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I would assume that hose that is capped off that used to supply the vro system with vacuum would be sufficient. oh and that pump looks like it will work as well. when ive looked up alternative pumps like this one the spec ranges from 6hp to 225hp.
 
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racerone

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The brass nipple on the bottom of the intake manifold is not to be used for a fuel pump !
 

AKJETB

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i am not referring to the one that goes to the intake i am referring to the one that has a screw in the hose. you can see it in his pics one page 1. that was the vacuum source for the vro fuel pump correct? so would that not be a sufficent source source for a fuel pump?
 
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