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Sterndrive templates? Sterndrive templates?
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Old 07-07-2011, 06:45 PM
DianneB DianneB is offline
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Sterndrive templates?
Does anybody know where to find templates for sterndrive mounting?

I am planning to replace the A-225 Chrysler engine and Penta 270 sterndrive in my 1966 Lonestar with a Mercruiser L4-3.0 and a Yamaha sterndrive and it would be REALLY helpful to have templates for both so I can determine what changes need to be made in the boat's stern. It would be nice if I could do this BEFORE I pull the drive out of the boat.

Thanks everybody!
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Old 07-07-2011, 07:01 PM
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gonzo gonzo is offline
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Which 270 is it? Does it have a round hole in the transom?
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Old 07-08-2011, 04:58 AM
DianneB DianneB is offline
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I seem to remember the housing as being very much round.
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Old 07-08-2011, 09:45 AM
Saildude Saildude is offline
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Sorry if you have already done this but have you tried searching for a manufactures web site? I would think that Volvo-Penta would have info on their outdrive. Many manufactures have large archives of even old equipment information just to keep down the requests coming into the company for tech info.
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Old 07-08-2011, 05:05 PM
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http://www.volvopenta.com/VOLVOPENTA...on_search.aspx
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Old 07-09-2011, 06:58 PM
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The hole will be bigger, so it will be no major problem to replace.
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Old 07-09-2011, 08:00 PM
powerabout powerabout is offline
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I only remember cutting the huge hole for a 270
Didnt know there was 2 types?
a 110 had a small round hole
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Old 07-10-2011, 04:33 AM
DianneB DianneB is offline
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I was on the boat this weekend and had a closer look. The 270 actually has quite a small cutout in the transom.

I DID search extensively and found the mounting manual for the L4 3.0 which shows how to use of the template but does not contain the template itself - I presume it is something you have to purchase from Mercruiser. I was NOT able to find the template or the installation procedure for the Penta drive.

It has become rather a moot point right now anyway. I did a compression test on the A-225 and it indicates the valves are bad (best cylinder 128, worst 63 PSI) so I am going to have to swap heads. If the cylinders look good (which I suspect they are because it burns no oil) I will be staying with the A-225.

I did learn enough to know that swapping engines and drives is a HUGE job. The mounting and aligning is only the beginning! Then there is the electrical, control cables, and so forth. As long as the 225 is rebuildable at a reasonable cost, it doesn't make sense to swap drives and engines.
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Old 07-10-2011, 09:05 AM
powerabout powerabout is offline
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how about a photo from the inside of the 270 transom plate
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