Awaking a 1971 evinrude..Need help

[neakdown3]

Re: Awaking a 1971 evinrude..Need help

k im pretty sure it has something to do with the carbs because everytime i mess with it it gets worse than better but i just cant get it right. i attempted to pull out the #39s couldnt get one out not sure if there in there. Used the drywall method. i slid it all the way in when i felt pressure rutned it a little and pulled out. i did pull out some gunk in there but thats about it.dark caramel gunk. did it to each needle pulled out gunk in 3 needles. put the needles back in. still sneezing and back fire.

 

[tashasdaddy]

Re: Awaking a 1971 evinrude..Need help

is it a poof backfire, or a bang backfire. band could be sheared flywheel woodruff key. have you had the flywheel off?

 

[neakdown3]

Re: Awaking a 1971 evinrude..Need help

no its more like a poof backfire. and no i have not took off the fly wheel tom. im a try to run it in the everglades and see how that goes.i guess i didnt clean the carbs to well, since there was some gunk in the chambers where adjustment needles sit. that could be the rough running. will see how it goes tomorrow.

 

[tmcalavy]

Re: Awaking a 1971 evinrude..Need help

That gunk means your carb is still dirty. Pull them again, dismantle and soak them overnight in a coffee can full of carb cleaner, one per can...I usually let them go a day and a night. Then use a fine wire to check the small passages, spray it clean with spray carb cleaner, blow it out with compressed air and you should be good to go. Start with the baseline carb settings already mentioned and work your way forward...a poof/sneeze backfire means it's too lean.

 

[neakdown3]

Re: Awaking a 1971 evinrude..Need help

ok had to pull out the carbs again they were getting flooded every time i cranked it up no matter how i adjusted the needles . First thing i noticed is that there are no bearings on either one of the needles and in the manual it does show a picture of a bearing in front of the needle. Is it for sure that i need the bearings for all the needles? Im wondering why the carbs would be on there with out the bearings in.. well should i go and buy these bearings and install them infront of each needle? it does not specify on the manual about these bearings.Everything else looks pretty clean but im a soak em overnight in carb cleaner anyway and clean em again.

 

[neakdown3]

Re: Awaking a 1971 evinrude..Need help

Is that the reason that gas floods through the carbs when i try to crank it up? cause its missing those lil bearings infront of the adjustment needles? Any advice will be appreciated. thank you again

 

[Lakester]

Re: Awaking a 1971 evinrude..Need help

I think you need to invest in an Evinrude Starflight 100 manual, post haste.

AMEN to that... and also follow iboat experts advice... and get a parts manual. i got one off ebay with mailing for about $11.00. a great companion read to my OEM service manual...

those items, a tool box worth a darn, tips from the iboat experts... and soon, u too... will be one.

good luck, i have enjoyed the thread. good info.

regards
lakester

 

[Theoutdoorsman]

Re: Awaking a 1971 evinrude..Need help

Just out of curiousity, have you tampered with any of the wiring? I had this same problem with my 1979 Rude. After re-building the carbs a number of times I found, with Dhadley's and others' assistance here at iBoats, that my wiring wasn't correct. After making one simple change, my rebuild was idling smooth as a kittens pur. Just curious. Good luck, and keep pecking away at it. I'd say $600 was a steal for the outboard!!! It's definitely worth the time and attention your giving it. I'll post a link to my thread in fixing my problem. Who knows, it may shed some additional light on your troubles.

Edit: Here's the link to my thread. Just in case you may have tampered with any of the wiring or possibly you might want to double check things. After all, you did buy a used motor, right? Hope you find your problem........

http://forums.iboats.com/showthread.php?t=178677&highlight=Theoutdoorsman

 

[neakdown3]

Re: Awaking a 1971 evinrude..Need help

No i have not messed with the wiring except for the lower unit shifter cables. but no problem there. i have my carbys disassembled. everything looks up to par. i think i just need those damn number 39's.im a go to b&f and try to get 4 of those bearings see if that solve the problem.

 

[Theoutdoorsman]

Re: Awaking a 1971 evinrude..Need help

No i have not messed with the wiring except for the lower unit shifter cables. but no problem there. i have my carbys disassembled. everything looks up to par. i think i just need those damn number 39's.im a go to b&f and try to get 4 of those bearings see if that solve the problem.

You'll get it. Just hang in there. There's some great expert advice in your post. Your definitely in good hands here. It's a little frustrating, but well worth the wait for other replies and additional knowledge. Be absolutely certain you perform a thourough link and sink after reassembling. Joe Reeves could walk you through this blindfolded, if you are not already familiar with it. The problem with buying a used outboard is that you don't know what the other guy messed with. Double, and tripple, check everything. Chasing your tail is never fun.......

 

[ezeke]

Re: Awaking a 1971 evinrude..Need help

If it is flooding that easily, you may not have your floats and float valves set up correctly.

Are you seeing fuel at the carburetors or out of the exhaust?

 

[neakdown3]

Re: Awaking a 1971 evinrude..Need help

k i will get those bearings next friday. The guy working that said i needed 4 bearings one for each needle. And as for the gas coming out, it runs out the carbs through the flaps. when i have it on choke and try to start it, i see a build up the engine wont start then i release the choke( open the flaps) and about a tbls of gas pours out. Again thanx for all the advice. Frustrated with everyone here telling me that its a waste of time and money. Im starting to feel confident that i can get this up and running. Of course with the help of you guys.

 

[ezeke]

Re: Awaking a 1971 evinrude..Need help

When the engine is cranked, The pistons create vacuum and pull the fuel from the float bowls. The floats drop until they open the float valves and then allow more fuel to refill the bowls. When the float bowls are full, the floats rise and close the valves so that no more fuel can enter.

When fuel builds up in the carburetors, it is 90% sure that the float valves are not closing, therefore not stopping the fuel from overflowing the float bowls which then has nowhere to go but into the carburetor throats.

Another possibility, but less likely, is that a reed is open, allowing fuel to be pushed back into the carburetor.

 

[neakdown3]

Re: Awaking a 1971 evinrude..Need help

When fuel builds up in the carburetors, it is 90% sure that the float valves are not closing, therefore not stopping the fuel from overflowing the float bowls which then has nowhere to go but into the carburetor throats.

how do i solve that? adjusting the float?

 

[ezeke]

Re: Awaking a 1971 evinrude..Need help

Fill the float bowls by squeezing the primer bulb. Then see if the fuel is stopped by the valves if you keep applying a little pressure.

If it is not stopped, you have to remove the float bowls from the carburetors and inspect to determine if the valves are bad or if the floats are bad. If the floats are bad, they can sink and cause the problem. When you turn the carburetor upside down, the float should be parallel to the bottom mating surface of the carburetor.

 

[Theoutdoorsman]

Re: Awaking a 1971 evinrude..Need help

Fill the float bowls by squeezing the primer bulb. Then see if the fuel is stopped by the valves if you keep applying a little pressure.

If it is not stopped, you have to remove the float bowls from the carburetors and inspect to determine if the valves are bad or if the floats are bad. If the floats are bad, they can sink and cause the problem. When you turn the carburetor upside down, the float should be parallel to the bottom mating surface of the carburetor.

Like this Neakdown3......

Correct me if I'm wrong Ezeke, but don't some folks suggest the other end of the float be just a weeee bit higher than the stationary/pivoting end of the float? If the kits you purchased did not come with new floats, you might consider replacing them with new ones. Might as well replace them since your already in there anyway. Beats taking them back off again. Besides, they're cheap to replace.

 

[ezeke]

Re: Awaking a 1971 evinrude..Need help

Joe Reeves always says something like "ever so slightly". I think that he wants you to err on the side of caution.

I have a bunch of spare new floats that I will never use. However, if I were working on a older motor and did not know the age of the floats, I would certainly throw them out. If you buy the OEM kits, they have the new floats in them.

BTW, That's a great picture of the float alignment, and it's nice to see the spring clip in place and the roller in good shape.

 

[Theoutdoorsman]

Re: Awaking a 1971 evinrude..Need help

Once you get the carbs back on, a proper link and sync is a must. I say this because it appears that your "choke butterflies" are not synchronized as mentioned earlier, in this thread, via Willyclay. Joe Reeves is definitely the man to walk you through it. I'm not certain about your link-and-sync, but if it's exactly like mine on my '79 E'rude 140, I can copy and paste the info here. It came DIRECTLY from Joe and is, by far, much easier to comprehend than that of the manual. As an added bonus, I have a few photo's to share as well. If you know for certain it's the same Ezeeke, I can forward the information to Neakdown3. But I wouldn't do this without knowing FOR CERTAIN that it's identical. Me being green and all, I wouldn't want to steer him in the wrong direction.

When fuel builds up in the carburetors, it is 90% sure that the float valves are not closing, therefore not stopping the fuel from overflowing the float bowls which then has nowhere to go but into the carburetor throats.

how do i solve that? adjusting the float?

Yes and no Neakdown3. Needles and seats are matching sets. If they are mixed up, all the float adjusting in the world could very well be a big waste of time. On the other hand, if you know for certain the needles and seats are brand new and are definitely a matching pair, never having ANY pressure applied to them which could possibly damage either of the two (keep in mind it doesn't take much to ruin them), then it's probable that a float adjustment will take care of the problem. But let's get those #39's installed and take it from there. Once your confident that you have all the parts installed and installed correctly, it will likely be much easier to isolate and rectify your problem. Posting a photo or two after rebuilding the carbs and prior to installation might be in your best interest. It could be a real time saver for you. Once you get the at-a-boy from other, more knowledgable folks, begin the installation of the carbs onto the powerhead and procede with a proper link-and-sync......... ;-)

P.S.... You did remove/replace the orifice plugs when cleaning......right? If they are left intact, not removed during the cleaning, and have any dirt in the three holes underneath each of them this could very well have a direct impact on the idle. Just some food for thought.