Dimensional .........
Ha! Mebee I shood youse a speel cheKer !Direct DIMENSION replacement..... No change of engine beds or shaft tube required.My only comments are that an A4 to Oil burner switch-out is going to cost $11-14K when you have to change nearly everything: trans, shaft, prop, tank, etc. And the oilburner is going to be MUCH heavier and possibly the boat wont sit quite the same on her water lines. A precision rebuilt and line bored A4 used to be about $3500 from the world's Atomic-4 'guru' -- Don Moyer www.moyermarine.com You can also buy Don's Maintenance and Rebuild Manual and evaluate for yourself if you REALLY need a replacment/rebuild .... as most A4s dont wear out, they corrode away from the inside. Honestly, nothing is 'smoother' than an Atomic 4. Are you SURE you want a jumpy-bouncy oil-burner? But if you are serious about ANY replacment you'd better hurry as steel and 'white metals' are soon to very sharply rise (again !!!) in price due to the high asian demand and the lack of USA steel mills foundries and manufacturers.