Cost if Problem with Automatic Compression Release (ACR)

16 years ago

Craftsman Lawn Mower

Mower DYT 4000 Model No. 917.273640

How much trouble is it to replace yourself?, cost of part? Estimate as to what would Sears charge me if they came to the house?

Sort by:Oldest

Comments (11)

walt2002
16 years ago
IF this is a Briggs engine, I may have some info for you. I do not do look ups from mower numbers.

Walt Conner
wconner5 at verizon dot net
baymee
16 years ago
Couldn't this also relate to improperly adjusted valve lash?
Related Professionals
Huntsville Landscape Architects & Landscape Designers · Frisco Landscape Architects & Landscape Designers · Martinsburg Landscape Architects & Landscape Designers · Anniston Landscape Architects & Landscape Designers · Fayetteville Landscape Contractors · College Station Landscape Contractors · Virginia Beach Landscape Contractors · Show Low Landscape Contractors · Sacramento Landscape Contractors · Cheyenne Landscape Contractors · New Bedford Architects & Building Designers · Mankato Architects & Building Designers · Green Bay Architects & Building Designers · Grand Junction Architects & Building Designers · Albuquerque Architects & Building Designers
mownie
16 years ago
It's a Briggs 31P777.
You know, you could start off by giving a description of what the engine is doing instead of just presuming that "whatever you have been told" is actually true, and asking about the costs!!!!!
We have know idea what your engine is doing (or not doing), and we also have know idea what you have been told will "fix it".
But I will bet that we can get to a solution if you provide us with more info on your engine's problem.

Here is a link that might be useful: 917.273640
jimbochap
Original Author
16 years ago
It's not my mower, It's mower I'm considering on buying if the price is right. I was told by the seller who just had it serviced 3 weeks ago and was told the Automatic Compression Release (ACR) was going. The mower is 5 years old.

That's all I really know about it. It is functional now and seems to run fine. I'm just wondering if worse case happens and it needs to be replaced a month or so after I get it.
lawnteck
16 years ago
The ACR can be a simple fix or the sign of larger problems. The ACR adds pressure to the exhaust valve to reduce compression for starting. The unit should not wear out as it is used at starting. What would concern me is if the valve has an issue rather than the ACR. That is a rebuild and is usually where customers opt for putting that cash to a new machine. As mownie said, you can't tell from a post.
mownie
16 years ago
Briggs compression release affects the INTAKE valve.
baymee
16 years ago
If we were talking about a low cost motor, I might balk at fixing a burned valve, but if everything else showed good with a leakdown test, I'd replace the valve.

Even with a good quality, small lawnmower flathead, I'd fix the valve.
walt2002
16 years ago
"Briggs compression release affects the INTAKE valve."

Except on the Vanguard V twin.

I have sent him info that may help with his problem.

Walt Conner
mownie
16 years ago

"Except on the Vanguard V twin."

"I do not do look ups from mower numbers."

Yes, that's why I posted this engine to be a 31P777.
walt2002
16 years ago
"Briggs compression release affects the INTAKE valve." "

""Except on the Vanguard V twin.""

"Yes, that's why I posted this engine to be a 31P777."

You don't think your first statement might be taken as a blanket statement covering ALL B&S Engines since there was no stipulation?

Walt Conner
mownie
16 years ago
Oh, sorry Walt. I guess it could be misleading in that respect.
Probably would have been clearer if I had said "THIS Briggs' compression release affects the INTAKE valve."