possible broken condenser?

[imported_griz]

hello, ive got a small evinrude 4hk, model "e4brcss", serial b088427, 2 cyl, water cooled. that only seems to want to run when the choke is engaged. as soon as i disengage it the motor dies direct. i also noticed that i have no continuence on one of the spark plug cables. while on the other one i do. the motor misses sometimes when running . time to change the condenser??
thanks
griz

 

[F_R]

Re: possible broken condenser?

hello, ive got a small evinrude 4hk, model "e4brcss", serial b088427, 2 cyl, water cooled. that only seems to want to run when the choke is engaged. as soon as i disengage it the motor dies direct. i also noticed that i have no continuence on one of the spark plug cables. while on the other one i do. the motor misses sometimes when running . time to change the condenser??
thanks
griz

 

[F_R]

Re: possible broken condenser?

No, it's time to find out why you don't have any continuity on that one spark plug wire.

 

[Vic.S]

Re: possible broken condenser?

Agreed sort out/ replace the defective plug wire. That should cure the misfire.

The need to run with the choke indicates either the mixture setting way out or more likely the carb needs cleaning. It'll need stripping down and the jets cleaning not just a blast through with carb cleaner.

I cant locate that model number but if it's a 1980 model then it has electronic ingition and does not have a condenser anyway!

 

[Xcusme]

Re: possible broken condenser?

I'll take a guess here and ask. Perhaps it's a difference in semantecs. Are you saying that one spark plug wire produces a spark and the other does not?
For the original post, I'll guess it's not an issue with an 'open' plug wire, as would be expected, with a broken conductor(s).

Usually , when your motor will run with only when choked, points to a fuel delivery problem in the low speed circuit in the carb.

 

[F_R]

Re: possible broken condenser?

A motor running on one cylinder, especially a small one, often does not have enough airflow through the carburetor to cause enough venturi effect to work properly. Get it running on both cylinders and very likely the carburetor will be OK. Carburetors do not "work" by themselves..they only react to pressure differences.

 

[Vic.S]

Re: possible broken condenser?

A motor running on one cylinder, especially a small one, often does not have enough airflow through the carburetor to cause enough venturi effect to work properly

surely the air flow will be more or less the same whether one cylinder is firing or not, at least provided the throttle is opened to give the same revs. Nevertheless The first thing to do is to sort out the misfiring. I imagine that there is a break in the plug wire which is why it shows no continuity when tested but is small enough for a spark to jump across some of the time hence the intermittent nature of the misfire.

 

[F_R]

Re: possible broken condenser?

You said it yourself...provided the throttle is opened the same amount to give the same rpm. Fact is the throttle has to be open a lot more to even keep it running on one cylinder. Open throttle + abnormally low rpm for the throttle setting = low airflow compared to what should be expected for that degree of throttle opening. I stand by what I said.