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Joined: Mar 2018
Posts: 147
Likes: 8
Apprentice level 2
Keep it up NormK :-)

Joined: Sep 2015
Posts: 2,590
Likes: 210
SENIOR TECHNICIAN & HISTORIAN
Hi all,

I just fitted the steel Victa needle and cut some grass for 1/2 an hour ,worked well no sticking no flooding.

The only thing I did before installing was putting it in the drill first and cleaning the taper up with 600 wet
and dry sand paper.

It should work good for Norm too.

Cheers
Max.

Joined: Jan 2017
Posts: 349
Likes: 4
Apprentice level 4
Hi Norm,

Fitting an F/C to a PT Super 24 base? Thats exactly the opposite to what I have done. My PT on a FC base seems to work well. Been going a few months now but not much growth during winter. Its quite a bit of work I found fitting these non standard motors to these bases but I'm sure its possible. My PT is fitted crossways like all PT's except those on 24's. I can not see that that makes any difference.

Its a pity we are not closer. I would gladly swap bases.

I still think that Suzuki would be worth a try. As you have said I do not think the power is much of an issue. Its the blade spimming mass that matters
.
Good to hear you are well to work even if it is on a Briggs.

All the best
Jeff

Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
Thanks Jeff,
Hip is 100 times better, at least I got the Briggs running. I have fitted a F/C on a 24 PT base before but it was a lot of work, not sure I want to go that way again. As for the Suzuki's I can't seem to find them now so they may be all sold out. I could drive down to the warehouse and find out, it is only 5 mins up the road. I still have a couple of F/C bases here at the moment that I have pulled the motors off, but as they are older the bases have suffered more wear up around the front axle and that requires me making up bushes to fill up where the alloy has been worn away.

Hi Max,
That is amazing, I can easily make one of those needles in the lathe, too easy. I did have quite a few of the briggs needle I was going to alter but I probably threw them out once I started using the viton needles. I will make one in the morning and see how it goes

Joined: Aug 2007
Posts: 386
Apprentice level 4
G'day everyone,

I thought it's time to go out and give the nature strip a mow today. I haven't got any fresh fuel but luckily I still had just under half a tank left in the old FC Commando so I thought that should be enough for the nature strip. I also added about half a cup of what was left in the plastic fuel container and just gave it all a good shake around before trying to start it.

This mower has been sitting for 3 months, the last time I started it and mowed the backyard was when I recorded footage to upload on these forums and that was on the 15th of May 2019.

I turned the fuel tap on, let the fuel flow for a bit then I just pressed the primer bulb once to see if it starts. On the second pull it briefly started then stopped. Then I gave the primer bulb another press and on the next pull "VROOM". Away she went and never missed a beat until I finished mowing all the nature strip. Maybe next time I should try giving the primer bulb a couple of presses instead of just once.

Cheers!


Zip a dee doo dah, zip a dee ay, another trash picked Victa, hip hip Hooray!
Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
Hi Converse,
when a float needle decides to work they are usually very good, it is when they decide to act up it can drive you nuts, but once they settle they usually cause no further problems

Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
Getting very close to giving up on these 2 strokes again, so sick of float needle problems continuing so many over the last week or so, fit new primer cap,new needle works fine for half an hours mowing and then the start pissing fuel out the primer cap. It can't be this bloody hard to get a float needle that actually works, Briggs and Chondas seem to be able to manage it easily. I won't be picking up any more mowers I'm done with it

Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
My latest idea is to set up a bank of 5/6 carbies polish the primer cap seat with a cotton bud with Autosol on it, fit a new needle and fit a fuel tank above the carbies and leave them with the fuel turned on for a couple of days to see if any leak. At least in doing this I can feel fairly comfortable that when I fit the primer cap and needle to a mower it should not leak. Hard to believe I have to go to all this trouble just because of these stinking float needles. Such a little thing that brings a tough mower to its knees

Joined: Jul 2018
Posts: 2,101
Likes: 81
SENIOR TECHNICIAN
Two great minds think alike Norm

I have been struggling for weeks trying to get a otherwise perfect SPFC TAC right. It had sat in my to do line since sept 2018 and finally got to it late last year.

This morning I went out and put a little bit of thin valve grinding paste on the end of a cotton ear bud, wacked it in the cordless drill and polished it up, pushing the cotton bud right up into the seat.

Hopefully it works when I get around to refitting the carby

Strange thing is it runs great when its running, but its a bugger to cold start; normally no less than 20 pulls in between removing the plug and cleaning it due to flooding.

Have been giving it a hiding cutting new garden beds in, along with starting retic ditches for me. Went through half a tank just starting it last time, which I struggle to understand how.

Fixed a PT with one of the worst floods I have ever seen last week - guy left the tap on for 15 minutes with a yellow needle and lost nearly half a tank again

Joined: Sep 2015
Posts: 2,590
Likes: 210
SENIOR TECHNICIAN & HISTORIAN
Hi Norm and Tyler

I think you are using the primer caps with the chamfer on the seat so the needle will seal ,if not
I can see the problem ,

Might be easier trying a pressure tester ,I was thinking of making one and using a Doctors
blood pressure tester hand pump ,the pump is only a few dollars online and just hook it to a pressure gauge.
That or just use a bike pump connected with a gauge.

The gravity feed idea should work it's just the time that it takes to wait.

I haven't had this problem ,if the cap leaks I replace the needle ,but I never buy new caps always just
take a second hand cap off a mower ,I know there are a lot of problems with low quality aftermarket caps,
the only way is to buy them from the same supplier once you know they are ok.

The pressure gauge would be a quicker test and is easier when testing the same needle in different caps.

I think you saw this video Norm showing the different types of caps that look the same on the outside.



I'm sure once you can get the caps and needles to the right specs you shouldn't have a problem
Norm but that may take some work as you say polishing the seat with Autosole may help but with
a pressure tester you can see the result straight away.

Cheers
Max.

Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
Hi Tyler and Max,
It can't be this hard to just get a float needle to work.
Max, I wouldn't trust a pressure tester in this situation, only thing I am interested in it testing the [Censored] things with fuel and the only way I can see to do this is to set up a rig with a number of carbs mounted on it and a fuel tank above it and just keep the fuel sitting on the seat for a few days. The Viton tip can swell a bit once it is subjected to fuel so at least being in the fuel it means I should be able to fit and know it won't leak in 2 days time.

Joined: Jul 2018
Posts: 2,101
Likes: 81
SENIOR TECHNICIAN
Norm, what about throwing a few in a bucket of 2 stroke mix for a month or so to get max swelling out of the way

I reckon a great deal of this issue is related to the swelling. Install, runs fine. Shut off engine then turn off the fuel tap - means the needle is at full height; the viton expands and catches in the seat (best case sticking, worst case damaging it).

I personally run them a little while after turning the tap off (but don't let them rev out at the end) and don't tend to have issues - but when I do I have a spate of them.

Max, I also find the old caps best, but they are progressively getting thinner on the ground. GA spares ones are useless, Victa genuine passable and Carbymasters are better, but still none are perfect.

Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
Hi Tyler
Only way I'm going with this is getting each primer cap and needle matched together tested on the rig and then fitted to a mower so I have proven that that particular pair work and will shut the fuel off. No other way can I see it working

Joined: Sep 2015
Posts: 2,590
Likes: 210
SENIOR TECHNICIAN & HISTORIAN
G'day Norm and Tyler

If the Viton is swelling I wouldn't bother using them ,I would just machine up some brass needles on the Lathe as
that's all some Stromberg carburetors ,early Villiers, and some motor bikes etc had and those needles and seats lasted decades with brass on brass.


Cheers
Max.

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Joined: Jul 2018
Posts: 2,101
Likes: 81
SENIOR TECHNICIAN
I think you are onto something here Max

60/40 brass has a density of about 8250 kg/m3 as opposed to mild steel at about 7850. Maybe the extra weight would help.

However I believe part of the issue is related to the fact it is a brass seat pressed into plastic; you can often see they are crooked. This is where viton shines as it will help seal a crooked seat.

There is also the issue with making the brass ones; stuffing around with a lathe with a piece of brass round stock. Even though I love 2 strokes, its just easier to throw a new carby on a chonda and put that on the deck

Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
Hi Max and Tyler,
I have to pick up some 1/4 inch tees tomorrow and I can connect up the 5 carbies to the fuel tank and see what happens. Each seat has been polished, new needle and primer cap. At least if any leak I can see straight away which one it is.

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Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
Ok so now I have the proof, I set up 5 in a row, turned the fuel on and 3 out of the 5 leaked. That is brand new primer caps from the Carbymaster so they are supposed to be the improved type and I polished the seats with Autosol and 5 new needles. Hard to believe all other manufacturers can make float needles that work and we can't get anything to work on Victas.

Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
Now after a further polishing of the seats on the offending caps I now have 5 sitting there with the fuel left on and only a minor weep on one of them. Now I will leave them there with the fuel turned on for 24 hours and see if any start leaking. Annoying that I have to go through all this crap just to ensure these things won't leak somebody has picked a mower up.

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100_1784.JPG (203.39 KB, 97 downloads)
Joined: Jul 2018
Posts: 2,101
Likes: 81
SENIOR TECHNICIAN
I reckon its related to weight, paired with the potential for the seat to be pressed crooked into plastic, paired with the seat latching the viton.

I have never seen a needle so small without a lever arm/fork helping it - even line trimmer carbies

Joined: Jan 2016
Posts: 8,063
Likes: 205
SENIOR TECHNICIAN
Hi Tyler,
I'm fairly convinced the problem is in the seat more than the needle. I now have 5 needles sitting there and holding fuel with the tap left turned on for 24 hours. I have polished up all the seats with Autosol on the cotton bud and I'm now fairly comfortable I could fit these to any mower and not have problems and even comfortable that if the fuel is left turned on it won't cause issues. You can only tell people so many times to make sure the fuel is turned off. Now my next test will be on all the needles I have in the reject container to see if I can get them to hold fuel as well. That will be interesting and hopefully polishing the seats in the caps will fix it.Another thing I have noticed with polishing the seat is that every needle moves up and down without sticking in the seat. It was always 50/50 before. Stay tuned I think I have solved it.

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