Bypassing oil injection

[lightflyer72]

I have a johnson 60 horse in which the oil injection was bypassed. The fuel still passes through the VRO and the smallest diameter hoses go from one carb to the other (don't know if this has anything to do with the issue). Once I prime the bulb and turn the key it seems that zero fuel gets to the cylinders. If I remove a plug and shoot some started fluid a couple different times it will run and stay running. If I stop the motor and let it rest for more than 10 minutes I'll have to do it all over again. What is preventing it from getting fuel in the beginning. Never once has it even tryed to fire without introducing fuel or starting fluid directly into the cylinder. Thanks

 

[tashasdaddy]

Re: Bypassing oil injection

you either have a weak fuel pump or stuck float needle valves. what year or model # is your motor. are you raising your fast idle lever when starting?

 

[lightflyer72]

Re: Bypassing oil injection

I do raise the lever when starting. Even with squirting the cylinders I must have the lever up or it will really struggle to start. What about putting a Facet electric automotive fuel pump in and don't even allow the fuel to pass through the vro in the first place?

 

[lightflyer72]

Re: Bypassing oil injection

It's a 91 by the way

 

[R.Johnson]

Re: Bypassing oil injection

Do you use the primer, and does the primer work?

 

[tashasdaddy]

Re: Bypassing oil injection

good question.

 

[lightflyer72]

Re: Bypassing oil injection

Primer bulb and it seems to be working and in good shape

 

[lightflyer72]

Re: Bypassing oil injection

In between posts I tryed something different. I removed the vro unit from the motor all together and now with the fuel line from the tank through the fuel filter and straight to the carbs without a fuel pump. I fired it up with a squirt of st fluid and it ran smooth. My goal was to see if a slight squeeze on the primer bulb while running would act as the pump. To my surprise it idled without holding on to the bulb. More of an experiment than anything else, I didn't realize the motor would continue to run. Expecting of course it more than likely wouldn't stay running while under way and on the throttle. Still need a fuel pump be it diaphram or electric. Now just the initial startup issue without the starter fluid.

 

[ezeke]

Re: Bypassing oil injection

Not the primer bulb, but rather the primer solenoid. Push the ignition key in and hold it in while cranking for a cold start.

The primer bulb and the fuel pump can only fill the float bowls. To get enriched fuel for a cold start, the primer solenoid bypasses the carburetor and injects extra fuel directly into the intake manifold. You still have to provide the initial pressure with the primer bulb of course, the primer solenoid is just a valve.

 

[R.Johnson]

Re: Bypassing oil injection

The engine will run as long as there is fuel in the carb bowls'? As I asked before are you using the electric controlled primer, not the primer bulb? Do you have the owners manual with the starting procedure?

 

[lightflyer72]

Re: Bypassing oil injection

The electric primer solenoid was removed a while back due to the end (red lever) breaking off and yes that was the trick to starting it before. Procedure I learned since the previous owner didn't know was to A: prime using the bulb B: remove engine cover and turn the red solenoid lever until I heard a "click" C: throttle lever in the up position. D: Turn key and adjust throttle lever till warm. Now that I have an understanding of the solenoids purpose I should replace it with a new one. Anyplace I can get a diagram showing where the fuel line connects from and then to from the solenoid? It might just be the cold hard fact that I need to do this after every 10 minutes of sitting, engine off. I should install a fuel pump since the VRO has been removed shouldn't I? Thanks guys.

 

[R.Johnson]

Re: Bypassing oil injection

That would have been a good thing to mention is the first post. I think you have gotten to the bottom of the problem.

 

[lightflyer72]

Re: Bypassing oil injection

Yea, I didn't even know what that was in the beginning of the posts. In the past thought it had something to do with the oil injection system and that has been off for a good year. Ezeke posted what it was then it clicked. That has to be it. I'll order a couple of replacement parts to fix the solenoid cover and that should do it. Thanks for the info guys!