what is rpm at wot for leaf blower? im getting 9400rpms - Snowblower Forum : Snow Blower Forums
 
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post #1 of 6 Old 07-15-2019, 03:56 PM Thread Starter
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what is rpm at wot for leaf blower? im getting 9400rpms

i have a circa ~2000 Poulan Pro Bvm200 leaf blower that i brought back to life. works fine but i put on a digital tack and it shows its revving at 9400 rpm at wot. what are specs for a 25cc 2 stroke leaf blower. ive put on a few hours running like that until i checked out the rpms.

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Last edited by vinnycom; 07-15-2019 at 04:00 PM.
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post #2 of 6 Old 07-15-2019, 06:10 PM
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Hello Vinny, I just checked the RPM's on my 2009 Poulan BVM200VS and I get 7900 max RPM's. I tried adjusting the carb while testing and still couldn't exceed the 7900.
Looking at you blowing leaves, the air flow doesn't seem very high. I can blow 2 inch diameter river rock across my driveway.
Are you sure the plastic fan is mounted securely to the crankshaft? I'm thinking the engine RPM's would go up if there is no load, such as the fan, on the engine.


Good job on the repair.

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Last edited by Grunt; 07-15-2019 at 06:18 PM.
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post #3 of 6 Old 07-15-2019, 06:48 PM
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I just found this info in the MTD service info for 2 cycle motors. Maybe yours is old enough to not have an ignition coil with the rev limiter.
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post #4 of 6 Old 07-16-2019, 12:19 PM Thread Starter
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Quote:
Originally Posted by Grunt View Post
Hello Vinny, I just checked the RPM's on my 2009 Poulan BVM200VS and I get 7900 max RPM's. I tried adjusting the carb while testing and still couldn't exceed the 7900.
Looking at you blowing leaves, the air flow doesn't seem very high. I can blow 2 inch diameter river rock across my driveway.
Are you sure the plastic fan is mounted securely to the crankshaft? I'm thinking the engine RPM's would go up if there is no load, such as the fan, on the engine.


Good job on the repair.
which tach did u use? afaik fan is on securely, in vid it was december, we had a thaw and everything was wet/damp. it blows anything dry pretty far, but thus is my first blower so nothing to reference it, it will move pieces of my crumbling asphalt driveway.
if it is truly revving at 9400rpms how would i lower it other than via throttle lever.
will post new vid of it to see if anyone listening to it thinks its over revving.

Bought a dead but now fixed 1980ish craftsman II 10/28....ITS ONE HEAVY BEAST

MY VIDS ON FIXIN HER UP

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Last edited by vinnycom; 07-16-2019 at 12:23 PM.
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post #5 of 6 Old 07-16-2019, 05:01 PM
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I never had much luck with the generic tiny tach style. I use a ES328 which is pretty accurate. I'm not sure how you could easily lower the RPM's and if you would even want to.


https://www.amazon.com/s?k=328+ez+ta...l_631gnxuz74_b

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post #6 of 6 Old 07-16-2019, 07:02 PM
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i got one just like that. about 4000rpm at idle and 7800 or so at full power and i got the exact same tach as you have on your snowblower.

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