Powerhead Woes

My first question is,..... what exactly makes my outboard "offshore" setup "offshore"?

I have a Mercury 2.4 EFI Bridgeport on a Vegas XT (28p prop, adjustable jackplate, hot foot, etc...). Apparently, we bought the boat with a blown head  (No power, it won't idle, etc....). The mechanic told us that the heads were welded on and that it would be just as easy to find another motor. Would any motor fit on the lower unit or how would this work? Are they telling me the truth? What kind of motor swap could be done? Please help, please advise. How is this motor really built?




The offshore is referring to the sand cast motor leg with the exhaust snout over the rear of the gearcase. This is the only motor with this and they made 2.4s with the standard leg. These would not be "offshores". How do I put this............... you need to find a mechanic that is not still stuck in the 70's. 2.4s have heads but the old inline 6's did not. The head bolts and the head gasket should have clued him. A true 2.4 is a little harder to find than he's making out. Some Merc powerheads will fit with relative ease. 150-225hp. Sounds like you have a big can of worms. 1st find a mechanic or shop that is "interested" in your boat and will discuss options for it. This is important to ensure that you don't get screwed in the process. You need to find out what you exactly have and what it will take to make it run for the most bang for the buck. Find this first and the rest will fall into place for you. Just for your info we have complete powerheads for just under 2K and they go up from there. Good 2.4 powerheads are over 4K so you can use that as reference.

Good luck,



Please submit whatever questions you have to IHRTechTalk@yahoo.com.  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.


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