Very excellent post! Thank You.
I'm trouble-shooting a low-idle problem. In other words, the engine runs fine when cold, at normal operating temp. it idles fine at (around 800 - 900 rpm) for about a minute or so, then it will start to stumble and the rpms drop to 500 -600. I've checked thoroughly for vac leaks, pcv and replaced most vac lines (didn't do the ones marked with yellow bands that seem to have something inside for who knows what?).
I've moved on to fuel and discovered the sight glass on the front of the carb (don't know why it took me so long to notice) and something is amiss. First, I couldn't see the fuel level (because the chamber was all of the way full (not right). After revving the engine, I've had the level at slightly above and below the mark but never right on the spot. So, I'm thinking a rebuild is in order which brings me here. I've done my share of auto repair out of necessity but I'm no mechanic so I'm a little worried about a carb rebuild (so many little parts to keep track of) but, with this guide I'm feeling more confident... so I really have to let you know how much this info. is valued.
I took a look online for the rebuild kit you recommend. On the Walker site its Hitachi #151000B and at first I was puzzled because there is a picture of all of the gaskets and rebuild components but no way to add the kit to the shopping cart. Then I realized you can click on each item and order it. Now, I wonder, is it better to buy a kit or just the parts that are needed. Of course, this probably more a matter of individual choice but I thought it might be useful for some to know you can get the components of the rebuild kit piece-meal. Here's the link: https://buy.walkerproducts.com/carburet ... nents.html
Any thoughts, insights or observations before get my hands dirty?