Johnson 40HP oil injection problem

[leotzian]

Hi to all
I am from Greece
I have a 40HP Johnson about 10 years old.My problem is with the oil injection.I use the boat not too much only in summer, so the boat had to stay unused for alot of time. When I try to fire it up, It is imposibble to start, I use the starter, and the choke but nothing alot of smoke and nothing.
The only way to start is to empty the tanks of the carbs. When I empty them both is full of oil.When I empty them, the engine starts at once, and I have no problem when I use the engine leaving it no more than 10 days.It works very well.
The problem is that in my engine it is very difficult to reach and empty the carbs, I have to remove the oil filter, and the oil injection pumb is in front, very difficult...
I am thinking 2 solutions
1) To remove oil injection or
2) To put a valve in the oil line to close the oil when I don't use the engine
I don't know it this helps, you are the experts and is there is any other solution?
If you propose, to remove oil injection, I have to put a new fuel pump ( because this one is oil-fuel ) or I can leave and this one? Is it possible to show me how?
And something else, One year I emptyed the tanks. I didnt started the engine, and in 45 days I tried to fire up it was not starting, and the tanks were again full, ( without starting the engine ), that is why I thinked to cut the oil line when the engine is unused for a lot time

Thank you in advance
Waiting for your answer
Leonidas

 

[DGartzos]

Re: Johnson 40HP oil injection problem

Pou'se bre aderfe!!! { Hi Brother }

It may be your oil tank is blowing up pushing oil throught line into your carbs. Check oil tank ventilation, clean oil tank cup before anything else.

 

[leotzian]

Re: Johnson 40HP oil injection problem

Gia soy filara ( Hi friend )
I have this problem since I bought the engine, but then I was using it too often so there was not problem, now I use it only in summer and I have the above problem

 

[countvlad]

Re: Johnson 40HP oil injection problem

Hi to all
I am from Greece
I have a 40HP Johnson about 10 years old.My problem is with the oil injection.I use the boat not too much only in summer, so the boat had to stay unused for alot of time. When I try to fire it up, It is imposibble to start, I use the starter, and the choke but nothing alot of smoke and nothing.
The only way to start is to empty the tanks of the carbs. When I empty them both is full of oil.When I empty them, the engine starts at once, and I have no problem when I use the engine leaving it no more than 10 days.It works very well.
The problem is that in my engine it is very difficult to reach and empty the carbs, I have to remove the oil filter, and the oil injection pumb is in front, very difficult...
I am thinking 2 solutions
1) To remove oil injection or
2) To put a valve in the oil line to close the oil when I don't use the engine
I don't know it this helps, you are the experts and is there is any other solution?
If you propose, to remove oil injection, I have to put a new fuel pump ( because this one is oil-fuel ) or I can leave and this one? Is it possible to show me how?
And something else, One year I emptyed the tanks. I didnt started the engine, and in 45 days I tried to fire up it was not starting, and the tanks were again full, ( without starting the engine ), that is why I thinked to cut the oil line when the engine is unused for a lot time

Thank you in advance
Waiting for your answer
Leonidas

ok buddeh im a little bit confused of your technics....

when was last time that you had a decarb done? also is this the way you start your motor??? http://forums.iboats.com/showthread.php?t=225510

do not remove the oil tank or line when you start the motor... if you carnk the motor or run it without oil will cause damage...

 

[leotzian]

Re: Johnson 40HP oil injection problem

Thank you all for the answers
Pephaps my problem is from the ventilation of the oil tank, Perhaps it is pressing oil with the sun's heat even if the engine is shut off.
As I wrote before one time the carb's tanks were filled with oil again after I have emptyed them without starting the engine, I cannot see any other explanation to this, tank lower than the engine, engine without power and shut off, and the carbs full of oil after a month I had emptyed them..
Your opinion is not to remove vro?

And something else it might help. The oil primer bulb, is very hard, you cannot press it, it is like fuel's when you press it sometimes until it hardens

 

[leotzian]

Re: Johnson 40HP oil injection problem

Feedback
1)I checked the oil's tank cap it has a valve that air is coming in but not out. Is that correct?
2) I tried to start the engine first time this year.Look what is happening that drives me to the only solution I have to empty the tanks of the carb's (who are full of oil)
I press the bulb on the fuel line until it hards
Then I push to ignition key to activate primer, I turn the key, the engine starts at once, after 2-3 second the motor begins to stumble, I press the primer again and the motor runs good again, but in 2-3 seconds the same thing occurs, press the primer again, this happens alot of times without the engine runs continiusly without priming. Always prime and prime and prime, but at last the engine stops.
I hope I had explained well for you to understand what is going on. When I empty the carbs tanks, the engine start and continius to run like a charm
Any ideas for this?

 

[tashasdaddy]

Re: Johnson 40HP oil injection problem

i had the same problem. solution:

VRO conversion w/ pump still working

if the fuel side on your Pump is still working it is very simple. unplug the 2 line harness going to the oil tank, unplug the 3 or 4 wire harness, going to the Vro pump. cut and cap the oil line going into the motor. add oil to fuel tank, mix well, then remove fuel line at top carb, catching gas in a container, pump the fuel line bulb until you get premixed gas to the carb. you can tell as it will change color. put line back on carb, and go boating.

 

[leotzian]

Re: Johnson 40HP oil injection problem

Thanks my friend tashasdaddy
I want to ask you some additional info
1) My vro pump must be working well because when my engine starts ( after I have emptyed the carb tanks )
2) When you say " then remove fuel line at top carb ", you mean a fuel line that goes in top of each carb that the primer sent gas? or the main gas line that cames from the vro to the carbs? ( I sent you a photo )
And another thing, Is there a way to start the engine now without emptying the carbs tank. because it is very difficult, I have to remove air filter that is infront very little space to do so.
Something else, An engine mechanic in Greece told me that I cannot use this vro pumb with mixed gas-oil, because this pump is gas-oil pump, and He must put a gas only pumb, costing 300 Euros. Is that correct? I think he is trying to take my money.

 

[leotzian]

Re: Johnson 40HP oil injection problem

A question about the cap of the oil tank

These is a small hole in the middle under the oil tank cap, On the top there is a small cap. I remove the cap and there is a small hole, I put in my mouth, try to suck or blow air in the hole, The air is coming in the tank not out.There must be a valve inside

The air in the oil tank must go both ways ( in and out ) through the oil's tank cap? or only from outside to inside like mine?