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Generac Generators (SEARS, etc.) Restoring, maintaining and operating Generac generators.

Generac Generators (SEARS, etc.)

Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper


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  #1  
Old 12-04-2011, 01:34 PM
Bassplayer1985 Bassplayer1985 is offline
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Default Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Hello Everyone!

I have been researching this for a day or so, I just got all my parts to rebuild my 2nd Generac 7000EXL. In my efforts with an air compressor to clean out the calcified and rusted passages i inadvertently blasted this little rubber stopper to oblivion, no idea where it went.

Model: 7000EXL
Model# 01470 rev 00

Now I did buy the rebuild kit, however it did not come with a rubber stopper. I researched that the passage is part of the idle control circuit. below is the rebuild kit i got. # 0A4600ESRV



What are the implications if this stopper is not in the carb?
WHERE CAN I FIND A REPLACEMENT?
OR A VIABLE POOR MAN'S REPAIR...maybe with a round o-ring?

It was located on the side of the main jet. Borrowing a picture from another forum member, Kudos to Dr. Fiero to illustrate my dilemma. its the shorter passage to the left.

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  #2  
Old 12-05-2011, 12:05 AM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Hey now! i think I may have found the solution? Thoughts? No auto shop or small engine shop had any stopper this small.

http://mrwaters415.com/Thing-07-15mm-5mm-Thing-07.htm

---------- Post added at 11:05 PM ---------- Previous post was at 10:38 PM ----------

Maybe not, research says EPDM rubber is terrible for fuel systems. Nitrile rubber is what is used. Thoughts?
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  #3  
Old 12-05-2011, 06:46 AM
RETCPO RETCPO is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Bassplayer,

I have never seen rubber in a carburetor where you have identified… I have seen a lead or aluminum plug in a cross drilled hole.
This plug acts like a Welch plug sealing the hole without causing a restriction inside.

Keith
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Old 12-05-2011, 11:13 AM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

I think there are threads in the shorter passage there. I'll see if I can find a small aluminum screw to replace the rubber stopper that was there. I was wire brushing the darn thing and saw the plug go flying not thinking to remove it first grr.


The passage is for the low idle circuit. I beleive there is a passage between the main jet and this circuit and the need for a plug of some sort to prevent the engine to run rich and lose the choke feature. Some people with these carbs have had to run them at or near full choke to prevent the engine from sputtering/dieing because of the missing plug. Without it the fuel goes through the brass nozzle and the opening and the venturi cannot create enough pressure to pull the fuel into the engine, possibly flooding too. From what I researched anyway.

I'm gonna go pickup a proper sized round o-ring today made of nitrile rubber and see how it goes. Unfortunatley I cannot find a diagram or parts list for this carb specifically. Prolly won't fire up the engine till maybe wednesday or the weekend, still repairing major electrical damage on the generator side too.
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Old 12-09-2011, 10:03 PM
twistr71 twistr71 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

where in ct are you?

i work at a small engine shop in colchester
we have been working on a LOT of generac lately
have some junk carbs
I know exactly what you are looking for
wont run right without it

shawn
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  #6  
Old 12-12-2011, 12:38 AM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

@twistr71 - I live in Naugatuck actually. Havn't been to C-town in awhile! Bit far from here. I was able to take an oversized nitrile oring and stick it in the idle circuit hole. Whether it will hold I'll find out either Wednesday or the weekend.

***I will certainly take a few extra plugs if you have them as I have two 7000EXL machines to maintain now.

You work on Generacs? Glad I know someone who does locally because the small engine shop I went to in Shelton told me in so many words to go screw, said he can't get parts for any of their stuff...which is BS since I was able to get everything I needed online and so could he if he tried...



Hey I also have a spare working rotor (part# B1432G) measures 8 ohms slip ring to slip ring, and after you flash the field it then measures ~18 ohms. If you need it. Willing to sell it.

the rotor was leftover from the rebuild of the first machine, bought a new rotor thinking the old one was bad but to my surprise the rotor was fine just the brushes were shot to hell thus my meter never showed a reading.
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Old 12-15-2011, 03:17 PM
twistr71 twistr71 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Our parts guys cringe when we need generac parts
they have become a lot better tracking down the stuff we need from all the work from the 2 storms
depending on their vintage and model they can come from different places
same thing with their engines too

service info can sometimes be a pain
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Old 12-15-2011, 05:32 PM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Hey I had to buy all my parts from a CA parts distributor, some I had factory drop shipped right to me. Three independent shops around southwestern CT told me buy a new carb for 70 bucks, or buy a new machine because they wont work on the gen head and engine work for generacs have been sitting for 1-4 months they tell me because lack of parts...and that they wont make money buying parts from another shop...my faith in local shops is nill because of this hard fact.

Thats why I buy online for parts and service my own machines. Finding parts for older machines is not hard, its just time consuming, and luckily for this project I have time to spare. Small shops can't seem to justify this time for THEIR cost.

Shawn, wheres your shop in c-town? I can use a few extra stoppers if you have any left. I've tried some custom rubber companies to make stoppers out of nitrile instead of EPDM but i havent heard shat from them. Guess I'm not flashing green dollar signs when I only want maybe 10-20 spares and not 1000-2000 spares.

EPDM rubber in gasoline is what soaking a tooth in coca cola is equal to...watching it dissolve away.

You should hear my current battle for a one year old Ariens Snowthrower. The cables that operate the deflector/chute have rubber bellows on the ends to prevent water and dirt getting inside the cable. If water got inside it would freeze and I got no control. Wouldn't you beleive it, Ariens only makes the whole cable for ~$35 bucks, not the small rubber bellow. Same issue with custom shops, don't see the point for a few parts and NOBODY has any spares lying around.
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Old 12-15-2011, 10:51 PM
twistr71 twistr71 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

i will see what i have laying around in the junk carb box
I work at Gano's power equipment
we are on rt 16 in colchester
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Old 12-16-2011, 10:01 PM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Thanks Shawn! I should be firing up the 2nd machine with my viton oring piece in the idle jet on sunday. If it don't stay I may be taking a trip up to see ya.
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Old 12-18-2011, 06:00 PM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

1. Okay now I got the engine running, but it is hunting/surging at like 2-3 hertz
2. The viton plug i made out of my oring in the idle circuit jet is solid in there not blocking the orifice between the main/idle jet passages which is super small compared to main jet
3. Main jet I cleaned out again and all the passages, carb is completely clean
4. Pulled spark plug, no carbon, clean, correctly gapped.
5. Not backfiring, just adjusted valve clearance, shouldn't affect it right? I know i adjusted correctly. .007inches at TDC for each valve.


I ran out of daylight today, but I'm gonna take the carb apart again and remove that plug I made and see how it runs. Maybe I don't need it?

I contemplated drilling out the main jet bigger but I didn't. Once I do that then I can't put it back to the way it was before.

Any suggestions for this issue? Seems my only problem left is just in the carb.


[/COLOR]seems like its running lean to me, no black smoke, and some hesitation., brand new fuel as well.
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Old 12-18-2011, 10:02 PM
twistr71 twistr71 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

I believe there is a pilot jet on the top under a phillips head screw
if it is even slightly plugged it will surge under bo to light load

make sure gov arm adjusted properly

valve lash being WAY off will make it run funny also

shawn
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  #13  
Old 12-19-2011, 10:42 AM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

I only adjusted the exhaust valve, as the clearance was greater than .09mm, the intake was hold steady around .08mm. The exhaust valve was somewhere in the neighborhood of .12 mm at TDC, So I adjusted it back to around .08.

Another poster had similar issues with valve clearance and idling issues. I'll start a new thread as this is a new issue. Thank you again for the advice shawn!
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Old 01-06-2012, 12:02 AM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Hey guys! I found the exact part from Briggs! Here it is! its the exact one you need. What a cluster F@#$ to find!!

Its Briggs Part# 694924

http://www.amazon.com/BRIGGS-AND-STRATTON-694924-PLUG-CARBURETOR/dp/B005F6PV8A
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Old 01-12-2012, 01:31 AM
Bassplayer1985 Bassplayer1985 is offline
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Cool Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Hey now!

Got my new carb! Many thanks to a fellow Smokstak member for hooking me up!

For the inquiring minds, the main jet size is your standard 106 jet, and has a .190 inch thread. (19/100)

I know for a fact briggs and stratton sells main jets by themselves. It is a very common jet, the trick is to match up the thread size in the carb.

Is there a dealer out there that can look at their stock of brass jets for briggs and see if they have a close match and provide a part number???
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Old 11-02-2012, 02:27 PM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Hey! been a long time since I updated this thread. So researched a bit more outside the box for supplying a replacement main jet. As mentioned it is a 5 mm thread and it has a 106 size stamped on the original. I think I have found a suitable replacement that is not from Briggs/Generac. I think these should serve well as replacements. hope it helps others.

Oddly enough, the source of this replacement is from the scooter industry.

http://www.dynoscooter.com/product_p/360.106.htm

http://www.shop.kidnmekarts.com/Jet-...t-Main-106.htm
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Old 11-14-2012, 01:33 PM
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

http://www.dellortodirect.com/Parts/...H-5mm-Main-Jet
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  #18  
Old 12-07-2012, 02:40 AM
JS2048 JS2048 is offline
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Default Re: Nikki Carburetor A4600 Rebuild: Rubber passage plug, rubber stopper

Quote:
Originally Posted by twistr71 View Post
I believe there is a pilot jet on the top under a phillips head screw
if it is even slightly plugged it will surge under bo to light load


shawn
Thanks for posting this, it's the one thing i didn't check and sure enough. Tiny speck no bigger then a grain of sand. Complete engine teardown and rebuild on an 8000XP portable and I miss this

Runs like a champ now and I think I can pull and clean the carb blindfolded, I did it so many times thinking a passage was plugged.
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