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You haven't given us enough information on how or what you plan on doing with this new motor.

A new motor is a huge expense and is entirely up to the boat owner.

You need to look at what reputable dealers are near you.

Would you really want a Yamaha 150 that weighs more then a Suzuki 175?
Maybe you really don't need the extra 25 hp for what you want to do.

If you could go with less power and you have a Suzuki dealer near by you,
Suzuki 140A weighs 407 pounds.

Talk to your local dealers.
All motors today are good motors.
Can anyone of us get a lemon? Of course. Just like anything else we purchase.