st824/1332le fast idle impeller rpm - Snowblower Forum : Snow Blower Forums
 
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post #1 of 4 Old 03-03-2017, 03:38 PM Thread Starter
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st824/1332le fast idle impeller rpm

Just picked up a 2004 1332le last saturday
The 1985 st824 ive had for 6 years repowered it with hmsk80 dom 92 after the 10 hp Lhead expired i put and impeller kit and a light on it max blow was 30 feet.
2 weeks ago i turned up the hi speed screw as it sounded low then i was afraid it was 4000 rpm so i went and got a tach here are the results fresh oil change
st824 was running 3150 must have been 2600 before shesshhh i set the rpm to 3700 the impeller rpm is 1050
It was blowing eod snow 30 feet max after i turned it up to 3150 by ear hoping for 40 feet now at 3700

1332 fresh oil change adjusted friction disk adjusted impeller belt adjusted deflector flap cable tightened all bolts adjusted skids set tire pressure engine rpm is 3456 rpm impeller rpm 1090 rpm the ohv358cc is rated 13 hp @3750 i think 358cc is closer to 12 hp
the fast idle screw is maxed out the governor needs to be adjusted to up the engine to 3700 rpm it looks buried to get at it
the rated impeller spec for this model 924128 is 1209 rpm id like to adjust the fast idle to see if i can get that rated impeller rpm of 1209 i hate changing the governor
I well be on an putting on an impeller kit this week i hope if it blows 50 feet ill leave it alone

Any thoughts or ideas??? town i was reading your post about impeller rpm etc

I WANT SNOW PLEASE
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post #2 of 4 Old 03-03-2017, 03:54 PM
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Tell me about the tach you used. Is it a light laser type that you shoot a mark. With those, do you use a mark, any mark, or make your own mark, like using a timing light.

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post #3 of 4 Old 03-03-2017, 04:06 PM Thread Starter
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Quote:
Originally Posted by JLawrence08648 View Post
Tell me about the tach you used. Is it a light laser type that you shoot a mark. With those, do you use a mark, any mark, or make your own mark, like using a timing light.
Yes you clean a spot put a a strip of reflective tape and shoot the beam of light on it works good 40 bucks harbor freight
very easy to use

Last edited by 1132le; 03-03-2017 at 08:04 PM.
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post #4 of 4 Old 03-03-2017, 10:39 PM
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To measure the impeller rpm is easier to find the impeller to augers ratio, then take the augers rpm and multiply it by the ratio to get the impeller rpm, this will give a more accurate measurement.
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