I keep hearing about valve adjustments for four strokes. Shim over bucket cam followers practically NEVER need adjusting. Over 10 years onn VWs, Suzuki bikes and Yamaha outboards, I have had to re shim a VW once after 140,000 miles. The suzuki and yamaha didn't need adjustment.
On the Yamaha F100, it took me an hour or two to check the valves. If they did need adjustment, that would be a pain, but they didn't. I did it for peace of mind, knowing that like every other shim over bucket cam follower, it was probably fine, and on the F100, it was. I don't know how many hours are on the motor, I think 800ish. The hour meter say a bit under 700, and it hasn't been plugged in all the time.
Maybe I am the rare guy who maintains his motors? So this doesn't seem like such a cost burden to me. I will do carbs and timing belts and valve lash and oil changes. So that might give me a different viewpoint
Also:
Looking at the Evinrude web page, the 135 is a lot heavier than I thought. I thought in previous years there was a 130 that was the same weight as a Yamaha F90, but it doesn't seem to be available any longer? So it seems like the modern 2 and 4 strokes are closer in weight than I used to think.
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