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#88162 13/10/17 05:40 PM
Joined: Jan 2015
Posts: 1,233
Likes: 32
Junior Technician
My orange power torque runs like a mad chainsaw.....
I would say normally at 3,000 rpm, but a coupleof days back It ran out of petrol. I don't have a kill switch and I swear it sounded like 4,000 rpm. I was waiting for it to self destruct.
I filled it up with petrol and did another lawn, ran sweet, nice and hot ....
Has anyone put a tacho on one....?

We're getting some green grass after a bit of rain now.

speedy
Bundy

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Last edited by speedy; 13/10/17 05:54 PM.

........................Keep your blades sharp......................
Joined: Jan 2015
Posts: 1,528
Likes: 23
AVB Offline
SENIOR TECHNICIAN
I don't about the rpm but it does looks like you might need a flat bottom boat. During the Spring my yard looks like that but it cover 6 acres. I have been threatening to buy myself a scuba diving suit so I can get to my shop on some days.

As the rpms you need to be checking it with a tach as it may be very well beyond 4000. Most of the Briggs around here are running around 3450

Joined: Jan 2016
Posts: 8,117
Likes: 231
SENIOR TECHNICIAN
Hi Speedy, when a motor runs wild like that the revs on a 2 stroke could possibly spin 8/10,000rpm at a guess, best thing to do in this situation is pull the plug lead. Any idea why it revved so high. The revs will increase just as they are running out of fuel as it leans out but the revs shouldn't increase that much

Joined: Feb 2006
Posts: 4,675
Likes: 165
SENIOR TECHNICIAN
There is a guy a few houses s down who uses a fairly late model power torque (late 1990s -2000s at a guess) and he always has it revving abit higher than it should at full throttle, but not at scary levels like you describe, just a higher note (might advise him to back it off a little!). His hasn't popped so far. It's usually a sign of an air leak somewhere, maybe the o ring where the carb attaches.
Sounds like you don't get much throttle control either. I would advise not to let the motor starve of fuel until you get to the bottom of the problem, or fix the kill wires/ install a spring loaded switch to stop for machine from becoming an air raid siren, or worse, a starters pistol. eek

Last edited by Mowerfreak; 14/10/17 03:39 PM.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Jan 2016
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SENIOR TECHNICIAN
I set all mine to get a nice low tick over at idle and then depending on the grass you are cutting use the revs needed to do the job

Joined: Feb 2006
Posts: 4,675
Likes: 165
SENIOR TECHNICIAN
My dad used to just set it to grasscutting and forget it!!


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Jan 2016
Posts: 8,117
Likes: 231
SENIOR TECHNICIAN
Nothing gets up my nose more than hearing a Powertorque revving its heart out mowing a lawn that is 3 inches high

Joined: Feb 2006
Posts: 4,675
Likes: 165
SENIOR TECHNICIAN
I was lucky to see my dad mow more than once a year, so it was needed for the 1 -2 foot tall grass with the late 1970s low arch Waltons store brand Victa 160.
Trouble is the habit stuck when he borrowed my mowers to do regularly cut lawns in later years, despite my protestations!!
I now kind of wish he still did people's lawns just to keep some of my collection exercised.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Jan 2012
Posts: 1,842
Likes: 14
Moderator
G'day folks,
Well, top governed speed spec for PowerTorques is around 3550-3600rpm for most models, ~3200 for Vortex and some wide cut utility types.

Not sure what revs they can get to as they lean out as they run out of fuel, but it sure can sound scary fast!


Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
Joined: Jan 2016
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SENIOR TECHNICIAN
Hi Gadge, can't say I have ever seen a Victa 2 stroke with a leg out of bed, the steel conrod makes them a very tough bit of kit

Joined: Feb 2006
Posts: 4,675
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SENIOR TECHNICIAN
So why are people concerned about them overrevving a bit higher than normal then? (Not referring to the original post here).
In the 1980s, our neighbour's late 1960s Corvette with wind up starter used to rev quite high and I loved using it when I did their lawn. I was a bit disappointed actually, when it was adjusted after coming back from a service at the mower shop.
I was to enjoy another high revving Victa again when I did this other woman's lawn and used her late husband's mower. I loved doing her lawn. We had some great chats too and I got to put her machine through it's paces. Good memories. Of course, I never kept them going at full throttle. I just liked to put it up for a moment to hear the higher than normal note!


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Jan 2016
Posts: 8,117
Likes: 231
SENIOR TECHNICIAN
I don't get concerned with Powertorques overrevving in particular, I hate seeing any motor revving harder than is needed for the job it is required to do,it is just that Powertorques are renowned for overrevving due to the carby design

Joined: Feb 2006
Posts: 4,675
Likes: 165
SENIOR TECHNICIAN
Has any one actually seen a Victa 2 stroke blow up from overrevving?


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Jan 2012
Posts: 1,842
Likes: 14
Moderator
Shouldn't think so, but if anyone has, it would be one of the gokart folk who used to mod [radically in some cases] Victa full-crank engines.

No way it could be done with factory barrel porting/carby/exhaust, I'd reckon - just not sufficient gas flow.


Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
Joined: Jan 2015
Posts: 1,233
Likes: 32
Junior Technician
Thanks for your replies. It hasn't done it again. Mowed a couple of lawns.
It ran fast, even faster than when I put a blower vacuum cleaner into a 125cc Villiers motorbike engine....... just to see the supercharge effect. Got easy 40% more power.
speedy


........................Keep your blades sharp......................

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