79 evinrude 35hp wont start

[mikevi]

Re: 79 evinrude 35hp wont start

grrrr so close, need new slow speed needle, stripped the outside where the knob goes trying to get it in thru the retainer, was using pliers to turn it in, is there a safe easy way to assemble this part? the rest of the carb all clean and is ready to go

 

[Sir Robin]

Re: 79 evinrude 35hp wont start

Unles you removed the old retainer,it is still in there... Now there are 2 in there. I did it once......the slow jet should have resistance to turning, not needing pliars to turn.I screwed the needle back and forth with wd to line the retainers/threads up. I wonder what the correct way to remove them is?

 

[mikevi]

Re: 79 evinrude 35hp wont start

its the forward retainer, that threads on the slow needle shaft, the other is completly removed, the small, the little plastic bearing was not in the hole, this carb doesnt have that part, I have read the sierra part "red retainer is a problem" which it seems it is, cant get treads of the needle to go thru it, and was scared it wasnt going in straight, though it could damage the threads in the carb. ordered the evinrude part and needle, hope for better luck, maybe turn it with the plastic knob on for better grip. also others beware, the directions that come with the sierra carb kit, measures the float hang from a different point as to what is in the manual,, read it 3 times, compare, be sure

 

[mikevi]

Re: 79 evinrude 35hp wont start

I was right, the sierra part is out of spec, the evinrude part works.
tried to start and it will turn over now for a 10 secs or less and then dies. tried moving the slow needle in some different positions, no luck, I do notice the new bulb I have, pumping it doesn't, well most of the time go firm, I can hear it pumping back into the tank, pumping the bulb doesnt keep it running. and it doesnt stay firm "O" rings on the quick disconnects maybe? and yes the Arrow points towards the engine.
Float drop is 1 1/18 " and made sure it was Parallel when upside down. it is a new fuel pump ( could be bad) I broke the other one the plastic in the middle where the thumb screw goes, actually it was the last thing I did before this problem started was the new fuel pump.how should the output of the fuel pump be, a strong stream or slow water spout?

 

[mikevi]

Re: 79 evinrude 35hp wont start

still no luck, today I got new gas, no help,, if I adjust the slow needle very rich, I can start and by engaging the electric choke on and off I can keep her running. sooo ,, in the manual the float drop they say for a type IV carb is min 1 1/8 inch, but that is or almost touching the bottom of the bowl, should it not be higher???they might of not covered all the type 4 carbs,

 

[jimdd810]

Re: 79 evinrude 35hp wont start

If I am not mistaken and I might be I think you may have your float measurments mixed up. If the float is near the bottom of the bowl when you adjusted it then when gas goes into the bowl closing the needle (im talking this out in my head as I go along) so when the carb is sitting in the right position as mounted you are measuring float drop. If the carb is inverted then that is setting the float level. I would readjust your float to the proper specs and you should be ok if the carb is good and clean. Another thought is where are you measuring the float when measuring the float drop? Meaning the bottm or top edge of the float. It should be measured from the lowest edge of the float when doing the float drop. If not measured in the right place then it will get your float in the wrong place. These things sound simple but there easy to mess up. Goodluck

 

[mikevi]

Re: 79 evinrude 35hp wont start

the instructions with the carb kit says 3/4 inch from carb body to top tip of the float, , the manual says 1 1/8 inch from the carb body to the bottom tip of the float, the manual measurement puts the float at the bottom of the bowl, my creative mind says it maybe should be closer to the middle of the bowl. the way it is now I think would start closing the needle to soon, so in other words, there should be a good amount of gas in the bowl before it contacts the float ?

 

[jimdd810]

Re: 79 evinrude 35hp wont start

Try this put the float almost level with the carb body when inverted and adjust the tab to it. Put it back on and see what you get. and 11/8 just seems like alot to me.

 

[mikevi]

Re: 79 evinrude 35hp wont start

well im a expert on removal now , I'll set to what the carb kit says , makes more sense than the manual did, that would put it @ mid level from the bottom, the inverted setting is good, and Parallel , couldnt be more perfect. I still have the old float, could measure that too

 

[mikevi]

Re: 79 evinrude 35hp wont start

still no luck, the engine will run a few sec s and die, gas in bowl, fuel lines have pressure,primer bulb stays firm, keeps shuting down like it ran out of gas, where do I go from here??
also checked compression, 122 in both, good sparks,

 

[mikevi]

Re: 79 evinrude 35hp wont start

Guess I am one that doesnt give up
cleaned carb 2x, with a flashlite I see all passages are clear, they pass light
compression 122 both, even got a new gage
started checking ignition
Battery is fully charged

all coils resistance checks ok
sensor and charge coil output check ok
Power pac output is low, 5v (dva)to ground (should be 180v)
during crank and jumpers are connected to coils in 3 pin connector for coil primaries Drops to 0 volts with jumpers removed from 3 pin connector (power pack output removed from coil primaries)
would that be possible if 5 v on the power pack output and still be able to fire for 2 sec's and keep alive by using choke ? ( rechecked output with three meters)
using spark gap tester, 7/16 gap but spark is kinda weak, if the output of the coils are 30000v, with 180v input, thats a increase of 166.66, so 5v times 166.66 is 833v, would that spark? could it be able to idle 2 secs as I have it here?

 

[bktheking]

Re: 79 evinrude 35hp wont start

You using a peak reading meter or a meter with a DVA, 5V sounds like just a plain old meter with nothing attached. If you are getting good consistant spark then it ain't the pack.

 

[mikevi]

Re: 79 evinrude 35hp wont start

using a DVA, 5v voltage also dissappears if I disconnect the ignition coils from the pac, voltage readings ok with same DVA setup for sensor and charge coil outputs. Using simpson 260 and 77 and 87 fluke meters, weak spark with 7/16 gap, any other test I can try? why no output when I dissconnect the primary of the ignition coils from the pac, does it need a load? manual doesnt call for one, unless the cd77, which I am not using, has one in the neg 500 setting.
Should the spark using a gap of 7/16 be very strong?