idleing problem.Help please!!

[Voges123]

Im having trouble with my motor its a 1978 35 hp johnson,its idles fine but when u put in forward an give it gas it will cough an putt an sometimes will die.Whta may be the problem.Thanks!!

 

[191Seanymphstriper]

Re: idleing problem.Help please!!

Do you have alot of presure from the tank to the motor is the pump bulb have presure in it in the line? Also have you changed the plugs?

 

[191Seanymphstriper]

Re: idleing problem.Help please!!

Try changing the plugs wires and also try hooking up a different fuel tank. See if any of these things work. You may have a bad hose or fuel pickup in your tank so use a comp diff tank and hose line. If these dont wrork take the fuel pump out and change the diafram if this dosent work change the coil and if that dosent work take the carb out and clean it! If it needs a rebuild kit there cheap and easy! For a motor to run you need fuel spark compression and air. Somthing is off and these are the only issues it can be!

 

[Voges123]

Re: idleing problem.Help please!!

191Seanymphstriper:Are ya talking about the fuel pump an diagfram thats on the fuel tank?An what coil should i look at? i just put in a new rebuild kit,an new spark plugs today,but i did find that the fuel lines that go from the carburetor to the fuel filter were cracked an had a possibility that they may have been sucking in air,but i wasnt able to start the motor cause i got done a little late,so i will find out tomorrow.Thanks for the response

 

[191Seanymphstriper]

Re: idleing problem.Help please!!

What rebuild kit did you buy? Meaning for what part was rebuilt?

Also when i said the coil I am talking about the (coil) is what gives current to the spark plug wire that gives ignition to the spark plug.

Also you need to replace all those gas lines with cracks in them for piece of mind , reliability and also it can be loosing suction if theres a holes in them and you could be getting air.

Also make sure theres oil in the fuel otherwise you will burn up the motor or if the motor has a seperate tank under the cowl to put oil in make sure its full if its oil injected.

And make sure when you crank it up you have water in a bucket so the motor can cool and pump water while your running it

Also buy a carb rebuild kit and rebuild the carb. Its cheap and easy and will give you piece of mind. It will also be another prob to check off the list.

 

[Voges123]

Re: idleing problem.Help please!!

i replaced all the parts that were in the rebuild kit,float,jet,gaskets.it pees out water an it has oil in the tank im gonna try an start her up today since i replaced the carburetor fuel lines yesterday.Thanks

 

[191Seanymphstriper]

Re: idleing problem.Help please!!

Let me know what happened!

 

[191Seanymphstriper]

Re: idleing problem.Help please!!

Listen. If its not running take the fuel pump off and rebuild it. The kit is very cheap. Change the diafram and this can cause it to be not getting enough fuel presure to keep it running. Hope I helped. GD Luck

 

[Daviet]

Re: idleing problem.Help please!!

Compression good? Spark good? Are you getting fuel to the carb? You can bypass the fuel by simply pumping the primer bulb filling the carb bowl with fuel. It should run for a short time with just the fuel in the carb bulb.
You can keep an engine running with a bad fuel pump by pumping the primer bulb. It may be time to overhaul the carb.

 

[191Seanymphstriper]

Re: idleing problem.Help please!!

yes but if the diafram is really bad it will just flood 1 cyl and still runn ruff and not come up in idle on all cyl! Changing the difram is a good idea to rule that out!

 

[Voges123]

Re: idleing problem.Help please!!

191Seanymphstriper:its still doing the same thing idles fine then give it gas then dies.can you give me a call at EDIT to make it go a little faster if you dont mind,i have a bass fishing tournament on the 18th an i really need to get this motor up an rolling.thanks

 

[Voges123]

Re: idleing problem.Help please!!

ok well i kinda found whats wrong put still not sure,if i put it at half choke then put it in forward an give it gas it will actually run pretty good,but then again when i push it to full choke an give it gas it cough an dies.???

 

[Daviet]

Re: idleing problem.Help please!!

If you have to use the choke to keep it running you have a carb problem. When you overhaul the carb make sure to remove the core plug on top of the carb and clean the passages underneith.

 

[Voges123]

Re: idleing problem.Help please!!

what is the main core plug?an were is that located??thanks

 

[Daviet]

Re: idleing problem.Help please!!

Look here,#5, should come in the carb kit.http://www.ishopmarine.com/ishop/jsp/AsplIsmCcatViewBase.jsp?&lvlCode=5&pCode=C0205548&path=BRP~A0000008~M0011681~M0011714~M0011715~C0205548&isFromCMS=false&hideAdd2CartButton=&isStandAlone=&is4CmsShop=&reqln=Unknown&reqem=Unknown&reqph=Unknown&reqFor=29&req4Browse=1&docId=&docName=&isForSupStore=false&cCatFilter=&eCatSupFldr=

 

[Voges123]

Re: idleing problem.Help please!!

ok thanks alot,but how do you get that peace out its kinda hard?

 

[Daviet]

Re: idleing problem.Help please!!

I drill a small hole, 1/8", in it and pop it out with a pick. Be careful and don't drill to deep, just go through the plug and stop.

 

[Voges123]

Re: idleing problem.Help please!!

ok i will thanks,will this get clogged up at all or cause problems?

 

[Daviet]

Re: idleing problem.Help please!!

There are some small holes under the core plug that can clog up and cause all kinds of low speed and idle problems.

 

[Voges123]

Re: idleing problem.Help please!!

ok i was lookin at the carburetor kit that i got an on the original one the #33 not the jet but the pin thing it doesnt have a head shaped so u can out that little spring around to attach to the float,but the new one does should i stick with the old one an gie it a try?