QuestionCleaned and inspected this old blower (as far as I was able), new fuel, new fuels lines, etc. Great service for long time. Recently started bogging down at high throttle. Moving to 1/2 choke seems to assist for few seconds while trying to analyze but can't get full performance anymore. (And yes, I have not been using marine grade gas - until today and may be too late.)
Owner's Manual & visual confirms an internal carburetor. PDF's don't inform me as to actual location of this internal carburetor. Research indicates it's a wallbro wyk-106, but this appears to be an external carb. Where's the internal carb ? What to do ? [enjoyed reading your bio...hope things are happening with your pursuits]
Thanks
AnswerI'm not sure what they mean by "internal carb". It might be referencing a reed valve but the parts list does not indicate a reed valve.
Below is the link to Walbro's repair manual:
http://wem.walbro.com/distributors/servicemanuals/WYKseries.pdf
I would complete a couple of other checks before moving on with the carb. First, is the spark arrestor, muffler ports, and cylinder exhaust port clean. Carbon can build up over time and block the exhaust. I use a propane torch to burn off carbon on the spark arrestor and just scrap the muffler or exhaust ports if necessary.
Second, check the engine compression. It needs to have at least 110 PSI of compression to run. Compression is often over looked and can cause unusual problems in 2 cycle engines.
Forgot to mention to replace the spark plug as well. I have had a lot of interesting problems due to faulty spark plugs.
Let me know what you find.
Oh yeah, I'm part owner in a small engine repair shop but my primary job is satellite communications.
Eric
