82 rude 115 rough idle stalling

[popeye1865]

the engine runs great at high rpm (above half) and below sounds like it's missing 1 or 2 cylinders every so often. im' fairly mechanically inclined and have no prob tearing into things but dont' know where to start with this engine. any links to tech specs would be great. my first feelings are that the jets are just miss adjusted but i have no manual and dont' know what is highlow/ speed adjustments and so fourth. any light you folks could shed would be greatly appreciated

 

[Bob_VT]

Re: 82 rude 115 rough idle stalling

Your low speed circuits are probaly clogged or clogging. I would spend the $$ and get the manual first. It just maybe time for a tune-up.

 

[tashasdaddy]

Re: 82 rude 115 rough idle stalling

totally agree, kencooke.com/ johnson/evinrude
the OEM service manual is the best. the other are pretty vague. the reason we recommend this is, it could be the carb, but it could be power pack, coils, and others. you'll be armed to cope with it with our help.

 

[popeye1865]

Re: 82 rude 115 rough idle stalling

thanks. having trouble finding the oem manual the kencooke.com thing isn't working.

 

[tashasdaddy]

Re: 82 rude 115 rough idle stalling

go to brp-evinrude, click english, click lower left, literature, will take you to kencooke site, click evinrude, follow prompts.

 

[popeye1865]

Re: 82 rude 115 rough idle stalling

didn't realize ther $100 i'm broke anyone give me some online help. i'm waiting to get my compression guage back to do a compression check. i checked spark and it sparks fine to all four cylinders. i have the carbs on my bench and they seem very clean and free of gunk. are there any adjustments able to be made or are they factory set. i see two cover screws on either side or the carb that give access to what looks like a jet adjustment (is this correct). what other things should i look into. when describing componets please be as generic as possible i'm not sure as to what and where all the parts are that people describe. thanks a bunch

 

[tashasdaddy]

Re: 82 rude 115 rough idle stalling

popeye the manual (Clymer) i have own your engine is not the OEM, and is so vague i can make heads or tails of your carb.

 

[ezeke]

Re: 82 rude 115 rough idle stalling

Ken Cook [No E in Cook] Does not charge 100 for the manual, that is for the set.

"http://www.kencook.com/evinrudejohnsonmanuals/index.cfm?fuseaction=search.main" [copy to browser without the quotation marks]

If you just want the service manual, get the part number and check the price at ishopmarine,com, then check maxrules.com and marineengine.com. Check with your local J/E dealer and EBay as well.

The service manual is all you need because every thing in the Owner's manual is repeated in the service manual, and the parts manual is on line.

The 115 Johnson is the same as the Evinrude except for cosmetics.

The 1981 is almost identical and you can pick up a manual for that on Ebay: http://cgi.ebay.com/ebaymotors/Evin...hZ002QQitemZ4632202053QQrdZ1QQsspagenameZWD1V

 

[emdsapmgr]

Re: 82 rude 115 rough idle stalling

You really should remove all the jets to be sure they are clear of obstructions. A special (screwdriver) tool is helpful. You can get it from your dealer. The carbs for that year show 6 jets per carb.

 

[popeye1865]

Re: 82 rude 115 rough idle stalling

what are the chances this is caused by a failed electrical component. it only charges at 11.5v but i did hook a charger up to it so i was sure it was getting full voltage while running and still no difference. is there an idle jet that can be adjusted?

 

[tashasdaddy]

Re: 82 rude 115 rough idle stalling

fixed jets, i agree you have a cruddy carb. do not spray carb cleaner into the engine, it removes all lubrications and can cause damage. remove the carbs and dismantle. clean extensively, and use a rebuild kit to reassemble, if you don't inho you are wasting your time.

 

[popeye1865]

Re: 82 rude 115 rough idle stalling

update. rechecked everything all grounds are fine with no improvements. swaped coils and "powerpack" (blue rectangular piece of electronics on the side of the block?) and still no difference. i have spark to all four cylinders but when i remove the upper wire on the starbord side there is no effect in rpm like with the other three. i swaped plugs and the problem did not move. i cleaned the carbs extensivly but have not rebuilt them. and i am getting a lean sneaze every so often any help would be appreciated.

 

[Walker]

Re: 82 rude 115 rough idle stalling

Your low speed circuits are probaly clogged or clogging. I would spend the $$ and get the manual first. It just maybe time for a tune-up.

Do the carbs.

 

[popeye1865]

Re: 82 rude 115 rough idle stalling

just pulled the air silencer off the front of the carbs and tried to spray some fuel into each barrel to determine if one was not supplying enough fuel. after spraying small-large amonts of fuel in each barrel the only response i was getting was rpm drop and sometimes cutout. i think that means that all pistons are getting proper fuel and my problem is in spark or the piston wear. is there a chance that the stator is bad causing improper spark timing/strength. i am also charging at 11.5 volts with nothing on which seems low to me.

 

[tashasdaddy]

Re: 82 rude 115 rough idle stalling

popeye, aparently you know more than us, everyone has said carbs. your the only one chasing electrical.

 

[popeye1865]

Re: 82 rude 115 rough idle stalling

i'm not claiming to know anymore thany you. but my carbs are clean i swaped them top to bottom and the problem did not move to a different cylinder which tells me that it isn't the carb. does this sound right? the only other flaw i find with the engine is the low charging voltage so i was hoping they were connected in some way.
thanks

 

[Cricket Too]

Re: 82 rude 115 rough idle stalling

Popeye, what are you checking charging voltage with, the dash gauge or a multimeter at the battery?

If you really want to check your spark strength, you need a spark tester. Healthy spark should jump a 7/16 in. gap. You can get a spark tester at any automotive store or make your own. You say you have spark to all 4, if it can jump that gap and is a lightning blue spark, than your probably good on spark.

Until you get your compression tester back, your not gonna know how the inside of that engine looks.

Also how is your gas, is it old, are you running a fuel/water separator?

 

[popeye1865]

Re: 82 rude 115 rough idle stalling

yea fresh gas and a decent jump with the spark the voltage is with my gps and multimeter. i'm beginning to fear the worst bad rings or worse worn cylinder. could always be a head gasket leak too.

 

[Walker]

Re: 82 rude 115 rough idle stalling

Could be. Could also be bad reeds, top crankshaft seal leak, lower crankshaft seal leak, crank ring leak, manifold gasket seal leak, crankcase halves seal leak. .....................
But taking your word for it that your carbs are sparkling clean, I'd check the recirculation valves for proper operation.

 

[popeye1865]

Re: 82 rude 115 rough idle stalling

where are these valves located
thanks