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Old 04-12-2010, 11:38 PM
barlaam1 barlaam1 is offline
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Join Date: Feb 2010
Location: Rapid City, SD
Posts: 22
Power Loss

I have a 99 Encore z48 with something like 2500 hours. I think it has a 18 horse brigs. The problem I'm having is when the motor is cold and I engage the blades it boggs down and isn't worth a darn. If I let it warm up you can hear the engine find a higher full throttle. then the mower works great for like 5 min. then I'll be mowing along and it boggs down back to where it was when it was cold. even with the blades off it can't get back into that sweet spot. what should I look at first? I havn't checked the plugs and the air filter could probably use replacing. I'm just worried this might be a head gasket. I can't mow with it when it is acting like this. Thanks for everything guys.
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  #2  
Old 04-12-2010, 11:43 PM
topsites topsites is offline
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Location: Richmond Virginia
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Uhhhh...
Plugs and air filter.

Don't just look at them, replace. gap .030
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Old 04-13-2010, 09:03 AM
barlaam1 barlaam1 is offline
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Location: Rapid City, SD
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will do that first thing today. Thanks topsite
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  #4  
Old 04-13-2010, 09:09 AM
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ALC-GregH ALC-GregH is offline
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Quote:
Originally Posted by topsites View Post
Uhhhh...
Plugs and air filter.

Don't just look at them, replace. gap .030
and if he looks at them and they are good? You're saying to just throw money at it anyway?

Check the fuel filter to see if there's dirt in it. It's most likely a in line filter.

If you're not sure what to do, consider dropping it off at a dealer.
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  #5  
Old 04-13-2010, 09:46 AM
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piston slapper piston slapper is offline
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2500 hrs on a Briggs ? Thats almost as believable as our president having a US birth cert.

In any case, you didnt say which 18 hp engine you had. I'm assuming you have an opposed twin. Sounds like trash in the fuel bowl. Remove the top of the carb and clean everything.
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  #6  
Old 04-14-2010, 10:10 AM
barlaam1 barlaam1 is offline
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Location: Rapid City, SD
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Well I got bad news. My mechanic said that it needs a valve job and the head gaskets replaced. what a great way to start off the season.
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