Gas cap for Toro Timemaster

[Donald]

I really love my Toro Timemaster mower. But the gas gas seems to loosen up on its own and come half off. The keeper holds it from falling into the grass.

The parts list and B&S support email said the correct cap is a #799585. I bought a real B&S one and it seems 1/4" too small in diameter. I can slide it side to side a little. Maybe not really a real B&S one? Fake?

The cap in the picture is the current one that falls off. B&S says those are production numbers and not part numbers. So no idea what the part number of the current cap is.

Maybe look for a replacement O-ring for current cap.

 

[ZebRuaj]

which engine do you have on your timemaster? I wonder if there is a difference between the older 190cc and 223cc

 

[jeepman3071]

798898 is the part number of the cap you currently have.

 

[Donald]

798898 is the part number of the cap you currently have.

That is what I thought but B&S said it was a production number. Cannot find that part number listed as a B&S gas cap.

 

[Donald]

which engine do you have on your timemaster? I wonder if there is a difference between the older 190cc and 223cc

 

[jeepman3071]

That is what I thought but B&S said it was a production number. Cannot find that part number listed as a B&S gas cap.

Looks like that number has been replaced with a different part number, 799585 and 799684 according to Briggs.

 

[Donald]

Looks like that number has been replaced with a different part number, 799585 and 799684 according to Briggs.

I have new 799585 in a bag. It's too loose. Does not fit like it's the proper gap.

 

[mk378]

On a late model Briggs, the QR code on the label leads direct to the support page for your engine.

Consider buying a new tank and cap together. There may be something wrong with the neck of your tank, or there may be an updated design.

 

[Donald]

So I ordered 2 more caps from two different suppliers on Amazon. I saw at least one comment that said something like order the cap based upon the part number in the cap not part number in parts diagram. That kind of sounds like others have same problem with a new cap not fitting.

Current solution is wrapping duct tape around the current cap thread so it's tighter. Cap stays on now.

 

[Donald]

So the two OE caps came. All three are 799585 replacements. One OEM and two OE. One of the OE fits perfectly. The other OE is too loose as is the B&S OEM.

Not sure what to think.

 

[Donald]

So the gas cap that fits tight when screwing it on appears to not be properly vented. The mower stops while mowing. I check for gas (there is gas) and the mower starts up again. Obviously checking for gas vents the gas tank.

I ordered another #799585 this time in a B&S package. It fits loose.

Stumped. Unless the gas tank has worn opening where gas cap fits. But never heard of that.

 

[The motor guy]

I really love my Toro Timemaster mower. But the gas gas seems to loosen up on its own and come half off. The keeper holds it from falling into the grass.

The parts list and B&S support email said the correct cap is a #799585. I bought a real B&S one and it seems 1/4" too small in diameter. I can slide it side to side a little. Maybe not really a real B&S one? Fake?

The cap in the picture is the current one that falls off. B&S says those are production numbers and not part numbers. So no idea what the part number of the current cap is.

Maybe look for a replacement O-ring for current cap

Buy a fatter oring off ebay for it and drill a hole in one of those indentations pictured inside the cap, but dont drill all the way through. That way it vents to the external vent. See that tiny hole with the mesh screen? The cap has two layers. Had the same issue with my timemaster. The factory oring is loose enough for it to vent, but when you put an oring that actually seals, you not longer have a venting tank.

 

[Donald]

Update on my gas cap issue. Despite having an assortment of OEM and aftermarket gas caps that are the exact replacement for my Toro Timemaster none do the trick exactly. Some too loose and come off and some too tight and engine stalls after 10 or so minutes of mowing.

I assume the neck/threads of plastic gas tank are worn and a new $90 tank is needed

I mow, when it stalls I open gas cap to let in air and restart. Every 10 minutes. If I am fast (who is fast at 71) I can open gas cap before it fulls stops and it will pick back up again.

Like the Yankees, maybe next year (new gas tank).

 

[The motor guy]

Update on my gas cap issue. Despite having an assortment of OEM and aftermarket gas caps that are the exact replacement for my Toro Timemaster none do the trick exactly. Some too loose and come off and some too tight and engine stalls after 10 or so minutes of mowing.

I assume the neck/threads of plastic gas tank are worn and a new $90 tank is needed

I mow, when it stalls I open gas cap to let in air and restart. Every 10 minutes. If I am fast (who is fast at 71) I can open gas cap before it fulls stops and it will pick back up again.

Like the Yankees, maybe next year (new gas tank).

I don't know, I had the same issue. Through a new oring on, then it worked for a while then about every 10 minutes you had to crack the cap loose for a couple seconds. No need to shut it off, just crack it loose slightly without removing the cap. You dont want fuel to come out of the tank. This pos vibrates so much it will vibrate gas out all over if you completely take the cap off, so don't do that. I got 600hrs out of it before something broke inside. Camshaft I think.

 

[The motor guy]

That briggs engine should be an embarrassment to briggs and stratton. Why would I even give their commercial engines a look if they can't even give you a smooth running residential engine

 

[jeepman3071]

That briggs engine should be an embarrassment to briggs and stratton. Why would I even give their commercial engines a look if they can't even give you a smooth running residential engine

In their eyes it lasted plenty long enough. I no longer own anything with Briggs engines. Everything is Honda or Kawasaki powered now.

 

[Donald]

The Toro mower itself is great. The engine is not in the same class as the mower.

 

[tbm5690]

The Toro mower itself is great. The engine is not in the same class as the mower.

Forget $90 for a new OE tank. If I were you:

1. Buy a larger aux tank (common Timemaster upgrade due to undersized stock tank) for the same or less money.

OR

2. Buy a CV224. Comes with a larger tank for FREE.

Not sure the hours on your Briggs but for $500 option 2 is compelling to get a motor worthy of the machine. Mine is only a season old but the first half-descent excuse I get to dump the Briggs out it comes.

 

[The motor guy]

One thing you can do is take a stainless clamp and put it around the neck to tighten it up some

 

[tbm5690]

In their eyes it lasted plenty long enough. I no longer own anything with Briggs engines. Everything is Honda or Kawasaki powered now.

Not to highjack, but with your OPE experience have you ever seen a Timemaster swapped with a GCV190? I saw someone do it online and rejetted the carb to allow a torque increase to better match demand, but I would be hesitant to do this going to that small of a displacement for this deck.