Setup & Trim on Older Outboards

Dear Randy.

I have an old Mercury Mark 58A 45 hp outboard with a whale tail and the stock prop on my 15 ft. converted fiberglass ski type boat that I rebuilt into a bass boat. The boat is a little heavy but will get up on plane no problem with just me in the boat and will do about 32 mph. But if I have another person in the boat it has a very hard time getting up on plane. I don't care to go faster but I need it to get on plane better. Are there any guidelines on how to properly set up an older outboard that does not have power trim?  Is motor height important? What do you think I could do to help get a better hole shot and get up on plane faster?

Tnx The Fish-N-Fool


For the speed you are running, I think you are already there. Move some weight forward to help the hole shot. That little outboard has barely 40 prop shaft hp, so your performance is good.




Please submit whatever questions you have to  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Mark C.


[ Home l About I.H.R. l History l Models l Registry l Members' Pictures l Feature Article l Tech Talk ]
[ Literature l Events l Top Guns l Guest Boat l Classifieds l Video Gallery l Racing Corner ]
[ Prop Slippage Program l Animated Videos l Screen Savers l HIN Decoder l Links l Contact Mark ]