Well, I certainly do NOT want to start another urination competition regarding YS engines; and I especially do not care to be told by the YS-O-philes that the reason I had difficulty with two YS engines is because I don't know how to tune an engine. Perhaps, but I seem to do all right with the many OS, Saito, and now this Laser four strokes; and my 91 FZ ran like a top for year before suddenly getting flaky.

Anyway, this Laser replaced that 91FZ, which was originally going into this model. If you feel comfortable with YS, then I have no doubt the 110 will have plenty of power. As we discussed earlier, I am just a bit leery of that "extra" stuff on your Laser 150. Side-mount the engine and take it all off...

Yes, the Laser is worth (so far) every penny. While it purrs at idle, that exhaust extension pipe produces a deep, throaty roar at full throttle that everybody who hears it comments on. I haven't run it with the standard, supplied muffler. Gary at Proctor told me that muffler will load the engine down somewhat.

I'm still tweaking the mixtures. I've got over a gallon through it now, so I'll begin leaning out the top end next outing. Gary said the top end wouldn't improve much, but the low end would get downright amazing;, like a steady 1800rpm idle all day long. Its idling around 2300 right now; it will go down to 2000, but I don't trust that in the air just yet, know what I mean?

I was concerned about starting it, and that open vent line (no muffler pressure), but both have turned out to be non-issues. Open the throttle to full, pull the prop through compression three or four times (WITHOUT choking), back to idle, bump it with the starter, and she's purring. And the potential siphoning problem when inverted just hasn't occurred.

The only fly in the ointment is the blow-by, leakage, whatever you want to call it, from the exhaust extension. There is a 90-degree bend right after it exits the head (for firewall clearance), and it is leaking from there due to the intense heat. Gary said that was to be expected, and not to worry because even if the part failed, it wouldn't hurt the engine and they would replace it. Sure is messy, though.

Overall, I'm extremely satisfied. The throttle transitions well, the engine starts and runs easily and smoothly, and has plenty of power. I was told that this engine puts out about the same power as a strong 1.20, and I'll agree with that. My Saito 150 had more top-end grunt, but it also shook like dog trying pass a peach seed. This Laser is smoooooth...

I'll post some pics when I get home.

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