Have to agree with John, you really shouldn't need to be doing this, you either have a weight problem or engine installation problem.
You can however get hydraulic lifts (jacking plates) to go on the transome which gives the outboard direct lift either up or down aswell as the engines own lift. They are used a lot on race boats. Marinautic supply them as they are the main hi-performance dealers for Mercury. They are at Cobbs Quay in Poole Dorst.
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