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coasteray


El Toro! 1028 LXE
Tecumseh 358cc
10hp


Location: NE Washington State
Joined: Mar 3, 2008
Points: 142

Tachometer rpm reading accurate on my Toro Tecumseh engine?
Original Message   Nov 20, 2011 1:10 am
I just started using my new hour meter/tachometer today on my blower, and it peaked out at only 3180rpm, but steadily displayed 3120rpm.  It is this one:

http://www.amazon.com/Tachometer-Kawasaki-Motorcycle-Generator-Snowmobile/dp/B0049IFX56/ref=sr_1_cc_1?s=electronics&ie=UTF8&qid=1321768364&sr=1-1-catcorr 
         

Using that horsepower-to-torque formula (HP = torque x rpm, divided by 5252), I get 8.66 HP at 3120rpm.  At 3600, it would be 9.993 HP.  For the formula I used a torque figure of 14.58, which I got by plugging in the assumed Tecumseh 10.0 HP figure at the assumed rpm of 3600, into the torque-to-horsepower formula (HP x 5252, divided by 3600).  Lots of assumptions, I know, but I had to get the torque figure that way so I could turn around the formula to get my horsepower figure at 3120rpm.

Anyway, I don't know if this meter is accurate.  When my son and I get his Ariens ST824 put back together again (took it apart to paint the inside of the housing; adjust the chains; replace the friction disc, cracked handlebars, and beat-up/bent impeller; serrate the augers using a Platinum 30 cardboard template I made while at Home Depot; greasing the chains, auger shaft, and friction disc shaft), then I will try my tachometer on his machine.  I may just pick up another meter to compare in the end. 

If the reading is the same on his, or close, then maybe it is the meter.  If he gets around 3600rpm at full throttle, then maybe I need to adjust my governor.   If I do have to adjust it, does anyone know how to do that?  It's only a three-year old Tecumseh L-Head 358cc.  Thanks for any help.
This message was modified Nov 21, 2011 by coasteray


  El Toro! 1028 LXE - Tecumseh 358cc 10hp   Let it snow! Let it snow! Let it snow!
Replies: 57 - 63 of 63Next page of topicsPreviousAllView as Outline
aa335


Joined: Nov 29, 2008
Points: 2434

Re: Tachometer rpm reading accurate on my Toro Tecumseh engine?
Reply #57   Nov 23, 2011 10:47 pm
MN_Runner wrote:
@aa335,

So to be clear, your HS621 is not for sale, right? http://chicago.craigslist.org/nwc/grd/2706687911.html


Nope, mine is not for sale.  Too much time and money spent on it to let it go.
This message was modified Nov 24, 2011 by aa335
FrankMA


Location: Merrimack Valley/Northeastern Mass
Joined: Jul 1, 2010
Points: 587

Re: Tachometer rpm reading accurate on my Toro Tecumseh engine?
Reply #58   Nov 24, 2011 9:50 am
aa335: It does kind of look like your garage in the photo....

Toro Wheel Horse 522xi GT, Honda HS928TA, Honda HS621AS, Honda HS520A, Toro CCR3000 (work in progress), Honda HS624WA (sold 08/23/2010), Stihl BR550 Backpack Blower, Stihl MS250, McCulloch MS1635, Honda EM6500SX Generator
MN_Runner


Location: St. Paul, Minnesota
Joined: Dec 5, 2010
Points: 622

Re: Tachometer rpm reading accurate on my Toro Tecumseh engine?
Reply #59   Nov 24, 2011 10:06 am
I did not think aa335 was selling his beloved HS621 and the pictures look so close.  The garage floor was painted in the ad and not sure if aa335 recently painted his concrete floor.
aa335


Joined: Nov 29, 2008
Points: 2434

Re: Tachometer rpm reading accurate on my Toro Tecumseh engine?
Reply #60   Nov 24, 2011 11:37 am
My garage floor is not painted.  I have plans to do epoxy paint the floor, but haven't find the time.  The pictures do look very similar to the ones I took.

A few weeks ago, there was a local CL ad for a HS621.  The seller used the exact picture of my snowblower!  Very misleading!  Gotta be careful of CL sometimes.  What you see is NOT what you get.
This message was modified Nov 24, 2011 by aa335
aa335


Joined: Nov 29, 2008
Points: 2434

Re: Tachometer rpm reading accurate on my Toro Tecumseh engine?
Reply #61   Nov 24, 2011 11:51 am
MN_Runner wrote:
I did not think aa335 was selling his beloved HS621.

I have some plans for putting in a GX200 engine with some performance mods that the karting guys do to it, with throttle control and remove the governor altogether.

I'm sure the chassis can handle it.  It's just a matter of time and money.
blumonster


Location: Wisc.
Joined: Oct 14, 2011
Points: 163

Re: Tachometer rpm reading accurate on my Toro Tecumseh engine?
Reply #62   Nov 24, 2011 8:30 pm
I read somewhere on the forum that aa335 painted his HS621.It looked brand new on the pictures, not faded like the ones on craigslist ad.
aa335


Joined: Nov 29, 2008
Points: 2434

Re: Tachometer rpm reading accurate on my Toro Tecumseh engine?
Reply #63   Nov 24, 2011 11:10 pm
blumonster wrote:
I read somewhere on the forum that aa335 painted his HS621.It looked brand new on the pictures, not faded like the ones on craigslist ad.

Yes, the HS621 went through a makeover last year.  Mechanically, it was very sound machine, everything was in great shape.  It did have some scratches and surface rust so I took care of it.  All wear items and fasteners were replaced.  The result was near showroom quality.

This is my stable.  More will come, but I'm fairly picky on the who makes the lineup.

This message was modified Nov 24, 2011 by aa335
Replies: 57 - 63 of 63Next page of topicsPreviousAllView as Outline
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