Recent content by EFSM

Are you talking about the cylinder not being centered on the crank? I know of only one modern 2-stroke engine like that (Echo/Shindaiwa 30cc SRM-3020/302). It seems like a really smart idea, but apparently there are drawbacks that I'm not thinking of because it's rarely done.

With older tech 2-strokes, this was largely the case, at least in relation to horsepower output. A longer stroke meant you could get larger ports for x# degrees of crank rotation, allowing for better airflow. With strato it seems like we've gone full circle and are heading for the Japanese...

Echo told us 5 years ago that they have the tech on the shelf ready when they need it, but they are extremely gunshy at this point. I expect we will see it sometime, but they've made out without it for this long, so maybe they will stick to their share of the market--people who are willing to...

I would assume the dealer had been switching bars around. It's probably a lighter laminated bar vs possibly a solid bar, but I don't know for sure (not a Stihl dealer).

How many hours or seasons are on it?

It may be overhyped, but supposedly the pistons can start turning in the bore, resulting in the rollers no longer being parallel with the cam. Then they shrapnel. I have several cousins that are diesel mechanics and they replace quite a few CP4's.

Trains this size are posing a real problem to emergency personnel waiting at a crossing. I wonder how long it will be until some famous person dies because the EMT's are stuck waiting for a 2-mile train, and some law gets passed to shorten them.

There is a little plastic plug in the middle of the carburetor rotor, right on top of the carburetor. Use a pic or Echo's special tool to remove it and that exposes a little flat screw, which is attached to the rotor needle. That's you idle mix adjustment.

Is the hose going to to the intake manifold between the throttle body and the heads? If so, that is a low-pressure area and will be drawing a vacuum. The reason that can't be done on your CH740 is that is is carbureted, and it would be impossible for the carburetor to adjust for more or less...

I've seen several trimmers through our shop with them on. People over 6' like them, although I never could quite get the hang of it (I'm 5'11"). It increases the distance from your hand to the shaft, which increases the twisting torque of the machine on your wrist.

As much as I dislike Husqvarna overall, those trimmers are astoundingly powerful for how extremely light they are. I have one (a 223, very similar) that I've used for many hours with a brush blade trimming around electric cattle fencing.

The picture looks better than my first port attempt at age 17, but that's not saying much. I sure wouldn't want to stand behind work like that.

Definitely not a stupid question, but they do rely on oil mist getting up there. I expect that if you were to put a clear OHV cover on the engine, there would be an astonishing amount of oil reaching the rockers. By the way, Kohler's have a seriously overbuilt valve train. Their valve springs...

Swedish fjord, maybe?

There can't be anything wrong with them. Started out as the perfect computer-designed saw, and has been reworked at least 30 times since release. Actually, I'm sure most work fine, but they've stung me too often to give them much time of day.