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Hello everyone, my name is Roger and I am the proud owner of a (new to me) max iv. I got it on a trade and now like every first-time max owner, I have a ton of questions. Not sure of the year but I believe it's a 1998-2001. It has a Kohler command engine. Model ch680. My first question is how many washers should be under the motor bench. This one has 15 washers as spacers and seems like they are also serving as a way to move the bench higher off the transmission.if I remove them then the bench touches the top of the transmission. This engine was an upgrade from the previous owner. Also I notice that it seems alittle underpowered. Rpms go too high before it starts moving, like if it doesn't have any bottom end. The top speed is 15mph and I have read it should be around 25mph. I took the max appart to do maintenance and install EZ shift links. I'm ready to assemble the max. Would like to do it right.