Here’s mine that I built several years ago, using pre-fab framing brackets and 2x lumber from the local big box store. The ’56 Johnson 30hp motor weighs around 115 lbs or so and I’m sure this stand could support up to the 150 lbs you’re looking for. This stand works real well for motor teardown, re-assembly, storage, transport or doing test runs.
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."