hard to pull start

[rocketkart]

if you did not get a Predator thin how do you now if thay got a compression release ?

 

[Doc Sprocket]

'Cuz I'm clairvoyant...

It's like this-

You got any idea just how dang hard those suckers would be to pull if they DIDN'T have one?

(I'd love to make a wager here)

Then again, I ain't never seen the wind, but I got pretty good reason to believe it exists...

 

[rocketkart]

mkay.

 

[OzFab]

i know i had these engines apart many of times and never seen a compression release on them so i bet your wrong doc. american and Canada models are probably different.

Where were you looking?

if you did not get a Predator thin how do you now if thay got a compression release ?

To the best of my knowledge, every single Honda & clone engine (not to mention other brands) ever made has a compression release, even Australian spec. I also find it hart to believe that there are a handful that don't have a compression release & you alone have 4 of them...

 

[rocketkart]

im wrong thay do have a compression release on the cam.

 

[Doc Sprocket]

mkay.

Well why didn't you say so in the first place?

Shown below- A new, stock take-off 212 Predator camshaft. See what I see? Here's the ad link- http://www.ebay.com/itm/Predator-21...420?pt=LH_DefaultDomain_0&hash=item3a7d7636b4

I just did some quick searching and found a TON of info indicating that these engines have the same compression relief mechanism as every other OPE engine built in the last several decades.


EDIT:

im wrong thay do have a compression release on the cam.

That's what I was suggesting all along!

 

[edgeblade]

Wow that compression release looks a lot different then the briggs engines I worked on when I worked for briggs (I worked in the run tunnel fixing all engines that left the assembly line for three years)...we made l-heads and ohv engi es from 13-18 hp

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[rocketkart]

im sorry

 

[Doc Sprocket]

Don't worry about it- no harm done. Age and experience...

 

[edgeblade]

Here is a little known fact with the ohv engines from 15-18 hp....one of the only and major differences between them is just the SPRING on the governor lol...yet briggs charges a few hundred more dollars for that lol

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[Doc Sprocket]

Here is a little known fact with the ohv engines from 15-18 hp....one of the only and major differences between them is just the SPRING on the governor lol...yet briggs charges a few hundred more dollars for that lol

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Can you be a bit more specific regarding the model range please? Include model numbers if you can. I know that some engines in that range feature differences in displacement.

On the other hand, I have in my garage an engine that was rated between 4-6.5hp, depending on the OEM application. The ONLY difference is spec'd RPM...

 

[danssoslow]

I wasn't going to argue.

You'll know it, if the compression relief decides not to show up when you pull that cord. That rope will snap back faster than you can let go. Now I ALWAYS start any pull start after the compression stroke, just in case. That's nine years worth of "never again"!

 

[Doc Sprocket]

You'll know it, if the compression relief decides not to show up when you pull that cord. That rope will snap back faster than you can let go. Now I ALWAYS start any pull start after the compression stroke, just in case. That's nine years worth of "never again"!

Ahh- The aforementioned "Age And Experience"! Hey- that sounds like the title to an epic read, like "War And Peace", or "Crime And Punishment"! Or in many of our cases, "Abrasions And Contusions!"

 

[danssoslow]

"Elbows and wrists"

I'm sorry, that sucked...

 

[OzFab]

im wrong thay do have a compression release on the cam.

Yes, we know...

That's what I was suggesting all along!

 

[edgeblade]

Can you be a bit more specific regarding the model range please? Include model numbers if you can. I know that some engines in that range feature differences in displacement.

I don't have model numbers its been a while since I worked there....ots mostly ohv single cylinder 15-18 hp motors...


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[Doc Sprocket]

Bizzarre... I'm pretty well familiar with Briggs single and twin vertical shaft riding mower-type engines, and I'm rather used to seeing displacement differences in that range. If you can dig up more info and provide some examples, I'd sure appreciate it!

I do wonder what the OEM app's were on the engines in question. It's not hard to understand a difference in "rated HP" based on peak governed RPM. One look at a HP/Torque curve for any OPE-type engine tells the story clearly. However- the majority of 4-cycle gasoline OPE engines are rated and set for 3600RPM within a couple hundred or so. So I cannot help but wonder if the lower HP engines you mention were governed down (and therefore develop a lower peak HP) for some odd, specific applications. Indeed- all that would take is a different governor spring...

One thought- I HAVE heard of some generators running 1800RPM...

 

[edgeblade]

There hp isn't based necessary on rpm but on hkw quickly that said engine acheives that rpm...with different springs in the engine u can get to a target rpm (hp) either quicker or slower that is what briggs does to determine hp

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[edgeblade]

I have personally seen engine change over (engine changes)...that have come down the line on the assembly line and the only thing different on the change over paperwork is the spring and the hp sticker we put on the engine...now granted its not much of a change maybe one to three hp differences but its a change none the less that briggs uses to be able to charge more.....they did that to the old ohv engines and to a certain extent to the avs that they rolled out the door

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[OzFab]

There hp isn't based necessary on rpm but on hkw quickly that said engine acheives that rpm...

If I understand that statement correctly, That's torque so, simply changing a spring will affect the torque of an engine?