Well, like a successful marriage, the first step in getting a new spark plug and a chainsaw together: discovering it physically fits. Step two will be similar too, to check the heat range and see if they are compatible over time. Replacing a Bosch USR4AC with a Champion RZ7C, and it physically fits. Now to start saw, if possible, and see how it runs. Otherwise, off to the OPE store where they will probably start off by taking the brand new spark plug out of the store so they can replace it with a brand new spark plug. And then make it run. Now where is my little screwdriver to adjust the degree of air pollution via those two screws on the side of the saw..... ? Brian
Saw will not start with new plug. Like mediocre marriage, saw has no spark. Off to OPE for counselin....er, I mean repair. On similar topic, 60cc Echo starts, and with minor adjustments, runs and cuts like scalded cat! Still, that saw is to large and heavy for casual 'around the house' use, especially with a 24" bar. Brian
There's less standardized than you think in the metric system. Check out these metric thread sizes and I've heard that these aren't even half of them. McMaster-Carr
Saw produces no spark? How did you check? Any easy way is to ground the booted plug on the cyl fins and pull rope. Try with different plugs. Easier to see in a darkened area. If coil does not produce voltage for spark -check if kill wire is grounded, check flywheel-coil gap, check flywheel magnets for magnetism loss (highly unlikely). Try new coil.
Yeah it looks that way, and there are all different standards, DIN in Germany, JIS in Japan, even our own in the US (yep, we have standardized metric measurement, we just do not use it) but for practical applications they are interchangeable. If you are talking about thread sizes and such, yep, there are LOTS of unusual sizes in the metric system also but by far the majority are standard, just like in the US. I like the metric system even though I fumble through it, and (looks to the left, looks to the right, looks behind him) often coverts to English measurement because it makes intuitive sense, I would go over and stay there if the country would go with me. When I was a kid, President Nixon put us on a 'ten year' plan to convert to the metric system. It seems the automotive industry had other ideas and here we are, 60 years later, trying to figure out how many times 5/8" will divide into one chain (length). Or maybe a fathom. Whatever. Brian
Yep, tried laying spark on cylinder head and pulling engine through with old plug. Then tried again with new plug. Now off to OPE store for the fix. No time to tinker. I have never taken anything to the OPE store before but am fully prepared: if $50 and saw runs and has some guarantee for work done, will pay. If it costs $185 to repair two year old $300 saw, will refuse repair, remove chain and bar and crush power head beyond all recognition and move on with life. Thanks for the suggestions and normally I may tinker around but time is short (in days and in my lifetime: I am old and still have things to fit in before MY spark plug quits..... ROFLMAO) so a quick try at OPE and then plan B. Brian
Here's the spark plug adapters of an old Champion spark-plug tester and cleaner. The upright adapters are 18 mm, 14 mm and 10 mm. The one on it's side shows the outside 7/8-18 thread they all have. The longer plug is an old Champion N-14Y with the Y suffex, not for most small engines. The small plug is a NGK BPMR 7A that many small engines use. You tested a plug by screwing it into the spark chamber with the correct adapter, hooking up the hot wire, pressing the spark button and running up the air pressure on the thumb wheel until the spark quit. The spark chamber has a glass back and a mirror so the spark is easy to see. There's a chart on the pressure gauge that tells if you have X plug gap you should reach Y+ pressure. Back when we were using leaded gas it wasn't unusual for a cleaned and properly gapped plug to spark good at low pressure but fail as you ran the pressure up.
metric is easier with the exception of building trades.. what's a 4 by 8 pice of plywood in metric?? a mess.. maybe just me
I wouldn't crush it. I would sell it or offer it free (they or yoi pay shipping)on here for parts. In the trading post or this thread. Someone will grab it. There still lots of good parts on that saw.
1.22 by 2.44 Meters! A lot (if not all LOL) Heavy industrial equipment is manufactured overseas and is dimensioned in metric. We use a lot of Metric dimensions in my trade.
TigerCat logging equipment is made in Canada. And I am pretty sure the bolts and nuts on all of it are standard american? Don't know about the hydraulic hoses etc.
That's crazy? I'm just shaking my head?? I guess they just say full or half sheet instead of that nonsense!
my experience in building only applies to aus. nz and germany.. only helping out friends as I travelled. I knew mostly kids.. heh I was 20.. older generation talked rods stones and knew feet.. so they called it 4 by 8 for ply wood.. 2 by 10 12 etc etc for dimesional lumber or longer sheet rock.. they assumed that was the name as it did not measure out to a 2 by 4 because of planing... cuts were hollered out like zip codes 313 425 etc. etc meant meter then centimeters
You know more than me...I can only speak of equipment (No construction experience in other countries). We don't use a lot of wood in steel mills!!
Well some countries, I think England really 'rings the bell here', have mixed the two systems into oblivion. They measure mass in grams.... except when weighing the things they use other system for: humans are weighed in 'stones', one of which is 14 lbs. And I believe they still use miles for distance but liters for volume, which must make for some funny fuel economy calculations and results. The worst of all possible systems is always more than one system I think. Brian
That 4 x 8 x 3/4 will be marked as being slightly smaller to allow for a 1/8 gap on each side and will really be 23/32 thick, not 3/4. I don't think I have seen a 4 x 8 sheet in many years that was actually a full 4 feet by 8 feet.
