Susan Quandt
New member
Hi. I have a giant marine? motor in a shed on my dads property. It has Gray Marine Model 725 in one spot and Z701 Always Give in another. My brother tells me there is a motor and transmission. I did a google search and can't find anything that matches this specifically. I'm a little confused because Wiki said Z engines were used in cars for a couple of years when a few guys bought Gray Marine and tried to take the company in that direction. i have no idea how old this engine is or if it even runs. I would just like to figure out exactly what it is. Thanks in advance for any help.