OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Briggs & Stratton Engines Carburettor for Briggs Stratton 5hp Engine

Hi, I am new to this forum and if what I am posting is in the wrong section I hope the Moderator will simply move it to the correct one and notify me please.
I bought a 5hp Rover Chipper Mulcher cheap as it was not going, it was in really good condition so I deducted its problem would not be serious, it wasn't but I managed to make it so.

Initially it would run if I started it with Aero Start and switched to petrol but if I cut it off for a few minutes it would not re start. I like my machines to work as designed so that was not what I wanted to be doing every time I wanted to use it.

I found the carburetor and steel tank were heavily rusted and gunked up, I cleaned the carb,( so far Ok) I then turned my attention to the tank, it was thick with gunk and rust, I used acid but it would not shift it so I tried scraping, here is where I came undone, there is a fuel collection bowl in the top of the tank, it fell to the bottom of the tank and there it stays.

I tried modifying the carburetor to do without the tank fuel bowl to scavenge fuel from the bottom of the tank with two dip tubes but that did not work, so I have a really nice mulcher that will probably require either a new/replacement tank and carburetor or a new/replacement tank depending on what is available out there. Advice on how to modify what I have to work would also be appreciated.
p.s. I am in Queensland Australia

Many thanks for any assistance
Graeme

Hi Graeme,

Welcome aboard the ODK Forums.

You have posted in one of the two correct areas, but as this is an engine related issue this is probably the better option, so congratulations on that bit. You've passed the test with flying colours.

Now as far as your issue is concerned these carby's if I'm correct have that small short pick up that goes into the start up bowl of the tank as they can't seem to be able to suck up from the bottom of the tank on start up. Once running they take their fuel from the long tube. Anyway that's how it's been explained to me previously.

Now as how to get around it will be probably best explained by either Jack, Norm or Gadge and I'm sure one of those well learned blokes should be able to help you out. Norm is a fabulous wealth of information on small engines and frequents here rather often, so I'm hoping he can get you out of that pickle in no time.

For now,

Cheers,
BB.

Yes. correct, it has a small tube that as you put it, is a start up tube. I was hoping that it would hold fuel in the new longer tube between starts, it would seem it just falls to the tanks fluid level and wont pull fuel up to prime, there is no prime bulb so back to Aerostart and run on the main fuel tube later, its an OK system when everything is working, I have stuffed everything it would seem, now to fix it (or replace it) I bet I get some out of the box ideas here.
I have a few Victa Twins I will be playing with next year, I see there are quite a few aficionados of the marque here. I am feeling more confident playing with them now I have some people to talk, to that like these.
Graeme

Hi Graeme,

Hopefully someone will be along soon.

Cheers,
BB.

Hi Graeme

It's been sitting for a fair period I would say. I couldn't see the pictures but I would say your best bet would be to source a good second hand tank and return the carby to original. The diaphragm will be unserviceable for sure. The filter screen on the end of the pick will most likely be blocked. The last rusty tank I had cleaned up OK after putting a handful of small blue metal in it with water and agitating for a period. If the filter screen is badly gunked up and the deposits have set hard I find the best remedy is to sit the screen in a small bowl of CLR clear and leave overnight or longer if required. The screen will be spotless.
Not an out of the box suggestion but I do think it will save you a lot of time.

Cheers
wce

Thanks for that. I'll be looking for a replacement tank and carb, I guess, In the meantime I am still looking around for something I can possibly fit to the existing tank as a fuel reservoir for the short tube to sit in, I can hole saw the tank to fit something if I can find something suitable, I know what the originqal looks like, its only a half round cup like thingie, I may find something I can secure in the tank to substitute. anyone got a clean replacement tank with the reserve bowl in place still?

Sorry I'm out of my depth here I don't even know what carby/tank we are discussing

G'day all
This is a Rover model 95 fitted with a 13 Series Briggs engine.
Plenty of information on these forums about pulsa-jet carburettors.

Cheers
-----------------------
Jack

I may well definitely need a tank, I can fix the carburettor, I bought a kit for it and I am quite happy with its condition now, I will however need a tank with its priming cup in tact, anyone in OZ that can help with this request?

The later model carby and tank combinations you see on eBay, are they adaptable to this, Will the carburettor slide on to the existing 5hp manifold? I have welding equipment available to attach new mounts to the newer tank and is would be desirable to have a pump primer, but don't want to buy one to experiment.

Hi Graeme

I don't have a fuel tank like that and I don't know what is interchangeable for that engine. I would think you would need to be mindful of jet sizes if you put a different set up than the original as your engine is 5hp.
Do you have any mower shops in your area? you never know what they may have in the way of second hand parts and is always worth a try.

Cheers
wce

Hi PC,

I'd also recommend that you put some photos up so everyone can see exactly what you require and that way others could chime in and maybe help out sourcing one for you.

Cheers,
BB.

I did try one local mower shop, he was very helpful but did say he had no suitable parts, even suggested the local tip store to scrounge one up, I had already been there to no avail, I'll keep on the lookout though.
Graeme

I can see the pictures at the top of the page, I have been told pictures aren't showing twice now, am I missing something? no one else can see the pictures?
Graeme

Yes they are showing now.

wce

Confirmation that all is good now, thanks to CyberJack at Admin for doing this.

Cheers,
BB.

Hello powerclocks and all,
To my knowledge, no.
The 10 series 4hp [100900] and 13 Series 5hp [130900] have interchangeable tanks.
The Rover Shredder originally had the 10 series, then both 10 & 13 series.

They are not interchangeable with the later pulsa-jets seen on eBay.

Definitely not.
The smaller pick-up tube was primed from a smaller reseviour in the tank.
This acted as a very clever and efficient primer.

Attached operator manual.

--------------------------
Jack

Thanks Cyberjack, what did I do wrong, I thought the URL min the message was all that's required, I use flickR for this when I am posting pictures.

G'day powerclocks
I think the tags each side of the hyperlink prevented the 'copy and paste
in new browser' approach.

We recommend folks use our server for adding images: HERE.

If you would like to add links to an external site, the
safest method is to use the FULL EDITOR and select 'insert link'



For example, here's an external link to the Betoota Advocate news website.

Morning Fellas

Ok, I will set one thing straight, The two tubes in a pulsa jet operate very differently to what you would think.

So the small bowl and pickup is not a priming tube. The problem is there wasn't enough vacuum through the venturi of the carburettor to pull fuel from the bottom of the tank to run properly. So what these engines do is; the pulse operated diaphragm pump on the side picks up from the bottom of the tank and dumps in the top little bowl; all it ever does. The engine runs by pulling fuel from the little bowl into the carburettor via the low pressure created by the venturi just as in any other float type carb. This principle has stayed in use right up to modern times on all small side valve briggs engines.

This is why these engines can be a pain to start if they have been sitting for a while, or if the diaphragm is getting hard, if fuel does not get put into the small cup at the top the engine will never run.

As for you're problem, It shouldnt be too difficult to find a replacement tank. Any 4-5hp from the 70-80's will have the right tank, its just a matter of finding one. Keep an eye out on marketplace or gumtree. Alternatively try and find an older mower shop. I would be fairly certain that the ones out here would have a tank or 2 lying around

Thanks for the information, I thought as such, I will see what I can do to find another tank, I want to use the machine and it has had little use from the look of it.