74 evinrude 50hp wont go *video*

[McGR]

Re: 74 evinrude 50hp wont go *video*

Sounds like the floats may not be closing properly. Were you tinkering inside of the bowls when you pulled the carbs? Maybe they didn't get put back together correctly?

When you say "isn't firing" - do you mean no spark?

 

[Boblester40]

Re: 74 evinrude 50hp wont go *video*

If the bulb does not feel like it getting hard it might be worth checking the needle valves on the floats of the carbs incase some gunk got underneath one, if this is not sealing it would flood that cylinder out and cause it not to run, did you use rebuild kits or just clean them ? the first option is definatly recomended .

rgds
bob

 

[Andy in NY]

Re: 74 evinrude 50hp wont go *video*

okay so heres where i am at:

it starts right up.

but it just doesnt sound right... i think i messed with the low speed jets.


should they both be relativly the same?

what i did was try adjusting them. with i turn the top one out it speeds up. when i turn the bottom one out, theres not much change till i get a few turns further than the top.

then i unhooked the choke linkage. if i manually choke the top carb, it stalls right out. if i choke the bottom, it doesnt stall, just kind of bogs a little.

 

[McGR]

Re: 74 evinrude 50hp wont go *video*

The attached link states the low speed needle should be nominally set at 1 turn. This is a rough initial setting that can be fine tuned once the engine is running.

http://www.marineengine.com/parts/technical_information/18-7222.pdf

 

[Andy in NY]

Re: 74 evinrude 50hp wont go *video*

well i finally got the damn thing running... dont know what i did but i just got back from the lake and all is well.


well, ALL is not well... still running rough at low speeds. under 7-8mph it seems to shudder... as soon as i give it more than half throttle it clears right up and ran tops.


could this have to do with the low speed adjustment? also ive been told the prop is the wrong size... its a 19p and im told i should be running a 17p. could this affect it?

 

[Lion hunter]

Re: 74 evinrude 50hp wont go *video*

This is just a matter of preference but everytime I start having carb problems I replace all the lines and filters and clean the pump as well. I get a carb kit if I don't know the last time it's been apart as well. And I'm sure that many of us (I know I have) have taken them apart multiple times to reclean after we thought we had it clean enough.

As for the low speed jets I usually start out 1.5 turns from seated, then turn it in 1/4 at a time until it starts to studder (wait 20-30 seconds after each adjustment to let the carb adjust) then back off 1/4 turn.

 

[Andy in NY]

Re: 74 evinrude 50hp wont go *video*

This is just a matter of preference but everytime I start having carb problems I replace all the lines and filters and clean the pump as well. I get a carb kit if I don't know the last time it's been apart as well. And I'm sure that many of us (I know I have) have taken them apart multiple times to reclean after we thought we had it clean enough.

As for the low speed jets I usually start out 1.5 turns from seated, then turn it in 1/4 at a time until it starts to studder (wait 20-30 seconds after each adjustment to let the carb adjust) then back off 1/4 turn.

do you do both carbs at the same time?

 

[Lion hunter]

Re: 74 evinrude 50hp wont go *video*

Yes. Except for the fuel pump kit which can be hard to get sometimes, everything is available and cheap. So I just get it out of the way.

 

[Andy in NY]

Re: 74 evinrude 50hp wont go *video*

Yes. Except for the fuel pump kit which can be hard to get sometimes, everything is available and cheap. So I just get it out of the way.

i was actually refering to adjusting the low speed jets at the same time... i planned on doing both carbs at the same time, i figured that was just a given. why is the fuel pump hard to get?