Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

[Krs1]

So I used the carb kit to redo my 55 fastwin. I bought the evinrude/Johnson kit and had a few things left over. Everything that I took out old went back in new such as gaskets and stuff so I didn't miss anything that was in there when I took it apart. I put it back on the motor and went to fire her up. It took about 5 pulls then fired like normal, it quickly died before I pushed the choke. I tried repeatedly and the same thing. What's the problem? Do I need to keep trying? Also while pushing the tank button to pressurize I realized a hole in the carb by the choke assembly that would spit fuel when I push the prime button, is this a overflow or is something wrong. Thanks people!

 

[levi_tsk]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

did you set the float properly ? with the top of the carb body upside down the end of the float away from the pivot should be ever so slightly lower than the pivot end that hole i think is the emulsification port for the high speed jet and if you getting fuel up that high then your needle and seat arent seating properly
did you put the tiny retaining spring on the float that holds the needle in place? and did you put the thin washer between the seat and carb body?
i have a 56 fastwin and these are common mistakes

 

[Krs1]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

Pretty sure I set the float properly, I did it how my manual said. Not a full service manual but it had a few key things. The spring no!!! Didn't know how and it didn't have one when I from it apart I believe. Would that spring cause it not to stay running? And is the whole overflow?

 

[levi_tsk]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

yes it could cause the needle to get hung up in the open position flooding it out - i just took mine apart and it didnt have one so i ordered a new kit and when it comes the spring will be in there when it goes back together let me go look at mine and make sure but theres two holes in the top of the carb one for airation of the highspeed fuel mix and one for a vent and if the vents clogged itll cause it to run out of the other hole and from what i saw its pretty common for it to be clogged

a good way to check the carb and make sure its working properly is to take it off turn it up side dwon and blow into the fuel inlet if it blows upsidedown then somethings amiss no blow turn it right side up and it should blow no blow right side up somethings amiss also

 

[levi_tsk]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

bowl vent

high speed emulsifior port

for the good of us all let us know if this works for you

the float needle retaining spring goes sorta like this the needle clips in to the loopie part and the other end goes over the float arm (this picture is the only one i could find and its of a lawnmower carb but its pretty much the same)

 

[Krs1]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

Those pic help a lot! The first pic of the hole is where it will overflow when I over pressurize. As far as the float needle I have a feeling that's my problem thanks guys I'll tear it apart and let u know how it goes. As far as the high and low needles I was told this is how they set, let me know if I'm wrong. For high speed screw till it sets, back off 2 1/2 turns then tighten. Place knob number at three. For low same procedure but 1 1/2 turns. Is this right?

 

[kfa4303]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

SOme folks think it's more like 1 1/2 (hi needle) and 3/4 (low needle), but you'll just have to fiddle with it a bit to get it just right. Be sure to wait a few seconds after each slight adjustment of the needles. Turns as slight as 1/8 of a turn can make a difference so turn them a bit then wait 5-10 seconds fo the rpms to change. The rpms should go up as you turn the needle in (clockwise) and should drop as you back them out. It's kinda like adjusting the water temp in the shower. Once you turn the know it takes a second for you to feel the change in temp. Here's a couple great links for setting up your carb. Good luck.

http://forums.iboats.com/showthread.php?t=167352

http://www.maxrules.com/fixtuneitup.html

 

[Krs1]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

Those help thanks. So I got it running in the trash can and attempted to do adjustment for low speed knob I think I got it but we will see. I need to drop it in the water to do the high speed. After running in the trash can I noticed it was pretty hot! The water in the can wasn't and I have ran it in the can bunches of times and this has never happend! WTF the carb job would have nothing to do with the heat right? Any ideas? I'm gonna go dump it in the water to see if it gets hot again. Is his a bad idea?

 

[kbait]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

Just leave the cowl off when you run it, and test w/finger. If you cannot keep your finger on the spark plug base or head nearby for a couple seconds, shut it down, as it's not cooling properly. Make sure your barrel water is well above the 'bulge' in the lower unit casing where the impeller goes when barrel-testing. The pump will not self prime, so impeller must be submurged to begin pumping water.

 

[kfa4303]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

Make sure you see it's actively pumping water too. If it's not shut it down immediately. Sometimes the water cooling pipe can get clogged.

 

[RadarRick]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

Levi - great job on photos & instruction!

 

[levi_tsk]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

thanks guys mine just happened to be apart still im waiting on the carb kit (its snowed in )
KRS1 i think you started too low on your low speed should be 1 1/2 turns for the high and 1 for the low speed and this could be why you seem to be running a tad on the hot side
im pretty sure you know what your doing but to set the low speed needle lower the throttle till it almost quits then you turn the low speed in in 1/8 turn and wait till the engine respond and then lower the throttle and repeat

take the two screws and the cover plate off of the lower unit when running in a closed tank and MAKE SURE that the water level in the can is just below the water indicator hole on the exaust leg the less head pressure that water pump has the better itll cool especially without the forward motion of the boat and if that doesnt help i have other suggestions

 

[Krs1]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

Levi_tsk you have been a big help in every post I've done so far including this one! I dumped her in he water and fired her up. I took both needles out and re adjusted to setting noted above. Ran way better right off the bat, did some fine tuneing and she now runs better than ever!!!! It used to sputter in idle but not anymore. Now that I have completed the project it was way easier than I anticipated and I learned tons!!! I feel I can do most repairs and the clutch dog is my next project seeing she goes real slow. That said thanks to all!!!!

 

[levi_tsk]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

just glad i could help 6 months ago i couldnt have told you didly about how to fix a 2 stoke - a car was a different story- but ive been reading and learning on one hell of a curve and in the last 3 months my learning has increased 1000% the guys on aomci.org have been REALLY helpful to me for me it was alot of applying what i knew about how to fix a car to boat engines
im warning you tough once you get to run that old two stroke out on the lake and shes ginning right and true, theyll start to multiply in your garage, theyre cheap to fix dirt simple and VERY VERY well engineered and a far cry from that new b.s. that they put out these days

are you gonna flip it over?
i know where theres a vidoe that shows you how to do that on one of these search g's garage on you tube hes actually doing it on you EXACT motor a '55

 

[levi_tsk]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

krs1 youve got mail btw

 

[kfa4303]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

Hi Krs1. Here is the youtube vid levi is talking about. It's awesome! It takes you through and entire fastwin rebuild from the ground up. Start around episode #16 and go from there. I just wateched it and learned how to replace my clutch dog too. It's not too hard. The gears are very simple and logical, just take your time and it'll all make sense just like the carb rebuild did. Good luck. Keep us posted. You may want/need to cahnge the lower unit seals after you crack the gear case open. iboats sells seal kits for about $25 or so. you may also no need a seal puller to remove the old seals They're about about $7 at harboor freight, but you might be able to get by without one. You'll also need gasket sealer to hold and seal the spaghetti gasket in place. You'll see what I mean when you watch the vid. Good luck. Keep us posted.

http://www.youtube.com/user/PistonPumper

http://www.youtube.com/user/PistonPumper

 

[levi_tsk]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

youll deffinitely want to change the lower unit seals but on the 55 and 56 youll have to buy the seals separately because they dont make a kit as far as i can tell marine engine sells them seperately and if you call them they may be able to put a kit together for you
also check with dan gano at ganotech.com

 

[Krs1]

Re: Did carb rebuild, now motor will fire but not stay running. 1955 evinrude fastwin

Very good! All you guys are the bomb! So I have l lower unit seal leak for sure cuz it leaks water when I tilt it forward and when I changed the gear oil it was milky. My question is my my boat shifts into all three positions no problem but won't go faster than idle in reverse. Is this the clutch dog? What do I need to do to diagnose? I thinks I'm goons do everything in lower unit cuz not sure the last time it was done. Prob in1955 lol