Victa Mustang 18 Ultima 4 stroke 5 hp (1994) carburetor gasket set or carburetor replacement?

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Franz47

Member
Victa Mustang 18 Ultima 4 stroke 5 hp (1994) lawn mower with Tecumseh engine.
I thought the starting problem was fixed by changing the ignition module, but today, after 2 weeks' absence, the same starting problem has reappeared. After priming many times, the engine starts at the first pull, but after having used up the primed gasoline, it stops again after a few seconds. So there still is a gasoline problem somewhere. I took off the carburator and noticed that the gasket between engine and carburetor (the big one) is damaged. Also, the gasket between the carburetor and the air inlet is not perfect any more. The gasket of the floater chamber seems to be ok.
On the carburetor reads 1579H4M.
I plan to clean it outside an then soak it at least overnight in carburetor cleaner liquid and clean it with air as well as possible. But without new gaskets there is no point in trying to fix it.
I searched for parts for this carburetor number without success.
Can anybody give a hint on where to get the gaskets?
Maybe there is a complete carburetor as a complete replacement for this one?
Thanks for any input?
 

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After soaking the carburetor parts overnight in carburetor cleaner, making the gaskets myself from an old gasket material I found, the engine started but then suddenly stopped. After a while it started again, worked as usual a while, and then suddenly stopped again and so on. I assume that the needle in the floater chamber sticks to its seat every now an then.
There are sets with this carburetor and gaskets on sale on ebay, so I ordered one. I will use the lower part with the floater and needle mechanism only, since these carburetors don't have an opening for the crankcase ventilation. I assume that the upper part of my carburetor is ok. A last try.....
 
What has happened since......
I bought a new carburator. https://www.ebay.at/itm/226691053840
The lower part with the floater has the jet in the middle. I tried to use it with the old upper part (since the new carburator has no crankcase ventilation connector), but the brass jet would not fit into the hole in the old upper part, so I used the old plastic jet. In the hole below the jet there is a tiny spring, which maybe was lost in the old carburator but in the new it is present. Assembled.
I also put a fuel filter between tank and carburator to prevent any impurity reaching the carburator.
AND IT STARTED AND WORKED AS ALWAYS BEFORE.
But......After maybe an hour it stopped suddenly and showed again the same behaviour as before what I thought was a fix. The engine starts with the priming fuel injected and after using it up within about 2-3 seconds of normal running it stops again. So definitely a fuel problem. That was last fall and I did not bother trying anything to fix it. Fuel contained fuel stabilizer over winter. I kept the mower with gasoline in the tank over winter. Or should it be stored empty?
Winter is over now and today I disassembled all again, there was fuel in the floater chamber. I checked the jet, no visible clogging. Assembled, same behaviour as last fall.
Any idea what can be done? Should I try to clean the jet with pressured air? Run the machine with the new upper part, brass jet and without crankcase ventilation? Any better source for a new carburator with crankcase ventilation connector?
 
Mate , this site is in the USA so they will not be able to be "Victa" specific , however B&S bought "Victa" a few years back so engine help may be possible
What part of Australia are you in
 
Ozcub said:
Mate , this site is in the USA so they will not be able to be "Victa" specific , however B&S bought "Victa" a few years back so engine help may be possible
What part of Australia are you in
Click to expand...
I am in Austria, Europe....bought the Victa mower maybe 1995 or 1996 here. Haven't seen Victa mowers for a long time here. It has lasted so well that I won't give up yet. Our second mower is a Swedish Klippo, also aluminum case, also undestroyable.
 
Rivets said:
This site does not have your engine, but the gaskets and carb are the same. Carb part number is 60730 and I think the two gaskets you need are part numbers 36182 and 36183. Hope this is of some help. https://www.partstree.com/models/ult50-500032d-tecumseh-engine/engine-parts-list-vlv40-0/
Click to expand...
Rivet if you go by the carb mfg # of 1579 it is a 632707 carburetor.
1776604149283.png

https://www.partstree.com/models/tec-632707-tecumseh-carburetor/carburetor-0/

Do you need the MFG to PN list for the Tecumseh carbs Rivets? It is 47 pages long.
 
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I posted that over a year ago and didn’t have that info. Thanks for the offer, but not at this time. As you my notice I’m slowly backing out of this forum due to health concerns.
 
Sorry about the health but understand them well. It took me going to a free clinic doctor to get straighten out here. Now I just got to my B12 level back up. My current doctor wanted to give me shots but through research I found out why I am low and I am taking corrective action on my end.
 
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