60 Johnson Problems

[Camaroon]

I'v red a few post on here to get an idea if I'm doing everything rite

Here's the problem the motor is hard to start.the only way I can start it is

to put fuel directly into the carbs,once started it will idle fine until that fuel

runs out.The fuel bowls are full the primer bolb ie empty.Things I have done are

*Cleaned carbs {there like brand new}

*The jets where wrong so replaced for rite ones

*New fuel tank

*New spark plugs

*New fuel tank

*New fuel filter

*New fuel line to all carbies

*New fuel line from tank to motor

*Compression is 125 in each

It's got me I've tried everything to get it going any help would be a great help

Cheers Cam :S

[mick fillet]

sounds like an air leek some where between the carby and fuel bulb. replace carby o rings look for cracked fuel line over tightened hose clamps etc. At the end of the fuel line is a fuel coupling that conects to the motor.disconect the fuel line from the motor look in the end of it and there will be a stainless steel ball wich acts as a non return valve when disconected but when it is connected the only thing making an air tight seal is the o ring in front of the ball.Even if it is brand new you may have pinched the o ring by accedent this will allow air to leek into the line and cause a problem like what you describe. when you replaced the tank fuel line did you replace the the two end fuel couplings?

[reelchippy]

Take it to coorperoo marine they are great cheers

[kriso]

sounds like mick is on the right track to me, also when you reset the carbs did you put the idle up, to get it running? i usualy do this then once running reset the idle to where it should be.

[noname]

this motor doesn't have idle screw kriso, either got to lean it out or fatten it up for an idle! older model motor.

[shortie]

When you installed the new fuel lin and the squeeze bulb did you put it in the right direction. There is an arrow on the squeeze bowl that indicates flow. It could be the wrong way around.

Simple i know but not uncommon.

[Camaroon]

Thanx guy's

Mick fillet All the fuel lines are new and they have no cracksand no air leaks.

The coupling is working also.I'm running pulp as fuel,And the bulb is pointing in the rite direction.I was thinking it mite be the fuel pump the VRO was disconnected by the bloke before me, is there anyway of testing the fuel pump.If I removed it would the engine still run.

Just a throught :silly:

[jackman60]

i o my johnson fifteen doesnt filter water to cool the engine anymore and theres nothing i can do according to my michanic he also got some marine guy to look at it

stuffed

im feeling your pain camaroon

chaz

[big al]

make sure your primer bulb is hanging vertical not laying horizontal because when laying horizontal the fuel can leak back down into the fuel tank :cheer: al

[Camaroon]

Thanx Al I checked that and noticed I had a leak there.I fixed that.I tried to start it after that and the only way it would start is if I put fuel directly into the carbies

once the fuel runs out the motor stopped.The fuel bowls where full the primer bulb empty

ITS A MYSTERY

[straddiebrad]

Camaroon wrote:

Thanx Al I checked that and noticed I had a leak there.I fixed that.I tried to start it after that and the only way it would start is if I put fuel directly into the carbies

once the fuel runs out the motor stopped.The fuel bowls where full the primer bulb empty

ITS A MYSTERY

mate is there a diafram in the fuel bowl sounds like somthing to do with the fuel bowlnot sucking it through

[boz]

have a look at the carby itself check needle and seat setting check seat oring not swolen and and check if the diaphram (this sucks up the fuel)in carby if it has one is not split, will the motor run if the fuel tank above motor. duz primer bulb go hard when primed, hope this helps :dry:

[Camaroon]

Thanx boz,the needle and seat seem fine I adjusted the float thats okay

I'm not sure if there is a diaphram in the carby.there's one in the fuel pump

[noname]

if fuel bowls are full on all 3 carbies and it still won't run, it would be unlikely to be carbies then? it should run all be rough with the fuel in the other 2. so maybe look for something that would cause all 3 to fail delivering fuel.

how long since last used??

how did it run back then??

[Camaroon]

Thanx Noname I'm not sure how long ago it was run or how it run back then.

Do you think It mite be something to do with the fuel pump?????

[rayke1938]

When you say you have to put fuel in carby do you mean that you fill the bowls and it runs till the bowl is empty or are you just squirting fuel into throat of carby.

If its the first option disconnect fuel pump and connect outlet of primer bulb to input of carbies. Place fuel tank above highest carby and prime and start. If it runs ok you have fuel pump problem. Normally just a hardened or split diaphram.

Otherwise Coorparoo marine of if you are tamborine way send pm to rumrunner.

Cheers

Ray

[shortie]

Fuel bowls full Primer bulb empty.

I reckon either the fuel pump isnt working causing fuel not to get from the fuel bowls to the carby or

There is a airt leak somewhere in the system.

disconnect the fuel line from the motor and pup primer bulb until a steady flow of fuel is running. Connect back to motor.

See if primer bulb remains hard.

Try to start.

If fails look at fuel pump.

[big al]

camaroon-if the primer bulb is empty seems as if not getting fuel from the tank is it a built in tank or a plastic one sometimes the primer bulb can go flat and not let fuel through to the engine- the primer bulb should always be hard with fuel in it another thing that could stop it from going is water in the tank or fuel as the water gets in the jets and stays there you should bee able to see some water in the bottom of carbies bowls then if fuel pump not working wont pump fuel through a mate of mine had a similar problem a few weeks ago and was water in fuel worth checking :cheer: al

[Camaroon]

No worries I'll give all those things ago.If it is the fuel pump I was talking to a bloke at the wreakers down the Goldie he was saying instead of the VRO pump that I have that theres a better way to go,a different pump maybe

[noname]

Camaroon wrote:

Thanx Noname I'm not sure how long ago it was run or how it run back then.

Do you think It mite be something to do with the fuel pump?????

look i don't want to really say this or that? i might be barking up the wrong tree type of thing, but you have relaced all the obvious things along with checking them, the fuel pump has a diaphram in it that works off vaccum, if it has a small hole, not sealing properly, or gone a bit hard, it will cause grief, and pretty much the last thing you have not changed or checked and quite easy to do so, failing that, give downes marine a hollar over the phone, they are most helpful with trying to diagnose a problem over the phone where some others are less willing to do so. and they really know omc motors, also coorparoo are pretty decent folks too. definately worth the phone calls though. as these guys see outboards every day with all sorts of problems, and sure they have had motors with very similar problems to yours, gotta be something simple with what you have said you have done.

rob

[Camaroon]

Thanx Rob I'll try the fuel pump if that fails I'll give the folks down at

Downs marine.Well boats aside I'm going fishing out at Bribie

I love holidays

[mick fillet]

Put water /detergent in a spay bottle and spray every were all round the fuel line joins fuel pump every where and pump the primer for 30 secs and if there is an air leek bubbles will form from the dittergent from the sorce of the air leek.

[tugger]

i couldn't see anywhere in your threads either that the fuel pump on your fuel line has been changed it is the most common fault and should be checked or replaced first as a small hole can't be seen. always go to the easy options first and work your way through them and blow air into your tank to clear the fuel pick up with compressed air

[Dazzamcgee]

looks like most areas have been covered tho I would pump up the primer bulb till firm then try starting the engine whilst gently pumping the primer bulb. this will help in finding out if the fuel pumps stuffed/any leaks..

Dont over do it or it will flood the carby tho i guess flooding its a good thing as then u will know its getting fuel........

[Camaroon]

Thanx tugger I haven't changed the fuel pump.Hay Daz if I pump the primer bulb while the fuel pump is conected the fuel passes strait through.But like tugger said it only takes a very small hole to stuff the fuel pump.I will give the fuel pump a go