Author Topic: Another 4 stroke trimmer.  (Read 642 times)

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Offline dannyupsolate

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Re: Another 4 stroke trimmer.
« Reply #10 on: June 03, 2016, 09:17:16 pm »
the top mount pull start is a sad joke on the new engine. plastic flippers mounted to thin sheet metal fan.

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Re: Another 4 stroke trimmer.
« Reply #11 on: June 05, 2016, 10:52:31 am »
The ones I have worked on seem to have a lot of torque and do not bog down as much in heavy grass or weeds.
They are a lot heavier then the 2 stroke trimmers and if used for a long time it can be a noticeable difference.
You have to be careful how much oil you run in them because if too full the crank case breather will push the oil into the air filter.    I have also run into some plastic cams on those which did not impress me.   The 2 strokes are easier to work on.
PP 505, 475, 445.
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Offline dannyupsolate

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Re: Another 4 stroke trimmer.
« Reply #12 on: June 05, 2016, 06:57:09 pm »

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Re: Another 4 stroke trimmer.
« Reply #13 on: June 06, 2016, 12:44:20 am »
http://wem.walbro.com/distributors/servicemanuals/WYLseries.pdf  diagram of a rotary barrel carburetor.

I read that when I first started working on those carbs.    Some very good information there.
PP 505, 475, 445.

 

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