Older Briggs carb leak

[omrkr]

Hey everyone,
Working on an old Wards generator powered by a Briggs model # as follows: 146432-1132-02 code# 7005201. Unit came in to be checked over, "hadn't ran in a while." I looked in the tank and saw that it was drained, some rust was present. I took the carb off and nothing seemed to out of the ordinary. Because it was off I put it in my ultrasonic cleaner. Reassembled carb, checked float setting, it is parallel with carb body. Cleaned sediment bowl and screen and added a inline filter Briggs #691035 to try and stop tank trouble. Put carb on engine, started but chugged a bunch, obviously too rich because of gas leaking by. Shut unit off and gas dripped out of the bolt holding the air neck on. Took carb off again, replaced Viton tipped needle valve and retainer with o.e.m. parts. Carb leaked again. Took it off again, bent float tab beyond the ideal setting, thinking that it would possibly put more pressure on needle valve. No, it just ran the engine out of gas after a short time. Now I am working completely for nothing. Took carb off again, ordered complete O.E.M kit from Briggs. Put in kit, still leaks. By the way, I can't hear any fluid in the float so I assume it is ok. The big question, NOW WHAT?

[AandPDan]

Did you replace the needle AND the seat. The seat can corrode.

You may also be leaking fuel around the nozzle.

Bruce had some good info in the old forum. Check here:

http://www.perr.com/tip9.html

[KE4AVB]

You beat me to it A and P Dan.

http://www.perr.com/tip9.html

[omrkr]

I couldn't get the notebook information to pull up at all. To answer the seat question, there wasn't a seat in the original carb. The needle had the Viton tip. The carb kit did have both the Viton tip seat and the aluminum valve with seat. Just for curiosity, I tried to install the seat in the carb but, it was too small and fell out. I was going to use the different style of needle and seat. Explain more if you could on the fuel leaking around the nozzle. Thanks a bunch

[AandPDan]

You'll have to copy and paste that link I gave you. It must be a restriction on the new forum. It will pull up Bruce's page if you do.

From the PERR forum use part #394682 for a gravity fuel system, needle and seat. It includes installation instructions.

I have an old Generac with the same carb. Changing the seat solved all my carb problems.

You can also have corrosion around the jet. You did remove it before trying to disassemble the carb? If it leaks there it can leak into the carb throat. There is a tip, using an old jet, to clean up the carb body to fix a leak there.

To be clear, the seat is brass and pressed in place. I don't mean the little "o" rings they give you.

[omrkr]

Ok thanks for the info. I will try those ideas. I did take the jet out before I put the carb (along with jet) in ultrasonic cleaner.

[AandPDan]

Double check on that brass seat. It is pressed into place.

[omrkr]

Yes it is the brass pressed in type. What can I do with that? Sorry for the ignorance.

[bluemower]

this is the old two piece flo jet carburetor. Here is a parts listing:
http://bsintek.basco.com/BriggsDocument ... svJVJ1DajI

Leaks are usually caused by the following:
1. leaking needle and seat valve (see page 3, item 105. The seat is not shown)
2. Corrosion on the seat of the lower atomizing nozzle (page 3, item 113)
3. crack in the lower carburetor body

Needles are included in new carburetor kits, but the seat is no longer included. If this is a pressed in seat, acquire a new seat from repair kit 394682 mentioned by A&PDan. Earlier models had a screw in seat, but I don't know if these are still available. The old seat requires special knowledge to remove.

The brass atomizing nozzle (page 3, item 113) has a small tapered seat that mates against a matching seat in the lower carburetor body (item 107). Corrosion in this lower carburetor body seat area will cause fuel leakage. If the corrosion is not too bad, it can be polished out, but special knowledge and skill is once again required. Briggs offers a Teflon gasket that may also help. Instructions for this repair are listed in the notebook on the old Per site. Instructions are also listed in the 1996 Briggs update.

A new carburetor is still available - PN 390323
The lower carburetor body is still available - PN 299170

[Deere2me]

Yes it is the brass pressed in type. What can I do with that? Sorry for the ignorance.

Get a manual here:http://www.perr.com/phpBB3/viewtopic.php?f=15&t=8002 It should explain how to replace a pressed in seat. I usually just clean em up with a bit of scotchbrite pad and a pointed wood dowel or pencil.

Scroll down to page 25, it will explain the nozzle problem. ( same as in Bruce's notebook) https://drive.google.com/file/d/0B9TTx2p1Vt5ZNW5mOHYyckliZk0/edit?usp=sharing
You can also use a bit of sealer on the main nozzle tapered seat. I have used Epoxo-88 ( a thin 2 part epoxy ) applied with a toothpick. If I run across another leaker, I'll use Seal-All,http://eclecticproducts.com/sealall.htm which is a clear one part sealer I have used on welch plugs,etc.

A FORTY-FOUR year old generator....sheesh!!!! Next time pay attention to the date code!