Question about Garden
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Posted on Jan 02, 2017
The 'DIPLOMAT' series of WEBBs is bad news, its NOT a WEBB! Webb were swallowed by qualcast-atco-suffolk, who dunped Webbs tooling, & dressed up punches & commodores in thin disguises, dumped the briggs & stratten engine for their own alloy job, & charged a rip off premium for the Webb decals!
The qualcast suffolk alloy engine suffers from a WIPAC electronic ignition unit. As it gets old, it fails, sometimes completely, sometimes as it warms up. Once cool, it works for a while again.
Not too hard to replace, but hard on the wallet, £69 genuine, £40 fake! On the whole its not too bad an engine if cared for & oil changed often. better to look on ebay for a cheap used HONDA engine & transplant! R-E-L-I-A-B-L-E !............I did! ( £35 honda gc series, 5,5hp! )
Posted on Apr 02, 2010
Testimonial: "Thanks very useful information.....Many Thanks"
make sure there is a spark plug in. that would be 1 reason why there is no resistance when you pull the cord. if there is a spark plug in then check to see if there is a clunking sound when you pull the cord if this is the case then the engine has a broken conecting rod..good luck
Posted on Apr 07, 2010
SOURCE: i have a mountfield sp470
Hi. The SP470 has a 4 HP Briggs and Stratton engine.
The part number should be 687171 and you can look here:
Take a good look at the valve end of the head gasket. From the pictures on the page you should be able to see which one of the 4 head gaskets on the page is yours.
If you have yellow pages you can look up lawn mower repair. Or small engine repair shops. All of them should have this commonly used headgasket in stock. Just find one close to you or.. use the link above.
Here is yet another link for the head gaskets but you have to scroll way way down the page or page search for 698717 or 272171.
Thanks for choosing FixYa.
Posted on Sep 12, 2010
It fails after it has 10 minutes to warm up right?
I think you should run it till it fails and then test it for spark.
My guess is that your coil is going bad and heat just triggers the failure. After a while even cooling down wont help.
The good news. If you need to replace the coil its a pretty simple job that can be done with a few hand tools and a new coil. It shouldnt be too expensive either. 25-35 dollars for a new one if your shop around online or go to Ebay.
The only thing special you need to do once you have removed the recoil cover and removed the old coil is to take a piece of thin cardboard *(I actually recommend the box the coils usually come in. But a playing or business card will do) Put this paper between the coil and the flywheel to set the coil gap. Tighten on the screws and then pull out the paper. Put the recoil cover back on and you are done!
Good luck and be careful.
Posted on Oct 12, 2010
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