Volvo Penta 270 Outdrive, what can it be hooked up to?
tonycougar
My friend has a Volvo Penta 270 Outdrive in good condition hooked to
a Volvo AQ125A. He wants to swap it out for a Volvo Penta 740 (?)
Can This be done with the current outdrive? Is there anything that
needs to be replace like the bellhousing or is his only route
upgrading the outdrive.
Tried talking to some volvo marine dealers but all they want to do is
sell you a complete new engine.
Thanks!
Tony
Greg Moore
believe the 270 was a 350 Chev, 270hp, I believe the 740 was the 454 Chev
(7.4L).. It would depend as much on vintage as anything else since there
was a change there from inch to metric attachment points. If however the
engines are in fact 350 to 454 most mounting points should mate. Chev was
famous for making all its engines generic on mounts, most V6's and V8's are
interchangable bolt ups and even many of the inlines will bolt in. As for
the drive, can't help you much there. If the 125 is as strong as an Alpha
One, then it will hold the 454 on a lighter boat that isn't hammered off the
line. It's the torque as much as anything that will eat the drive and the
loading is worst if you apply full throttle from a standing start.
He has to find out specific engines in question, find out if it is inch or
metric block(s) and verify that in the case of a Volvo, the mounts still
match. Also let your friend know that he needs to asses his uses. He can
modify a 350 Chev to reliable 300-325hp and it's torque will only increase a
bit. A stock 454 runs 330hp but with more drive eating torque and more
speed and fuel eating weight.
Greg
--
"tonycougar" <72cu...@optonline.net> wrote in message
news:mhn4601bshbdojavn...@4ax.com...
Mike Cleaves
of the engine. You need to read it the other way The 280 refers to the
outdrive, not the engine displacement, so there is no correlation between
the 270 and 350. What he has is a 4 cyl Volvo engine (aq125) hooked up to a
Volvo 270 outdrive.
You could do a direct swap with any Volvo 4 cyl, like these aq125a, aq125b
and the aq130. All of those will just bolt up and the gear ratio for the
drive will be fine.
The real question is what is a Volvo 740? If it's a 6 cyl, the drives gear
ratio may have to be changed and if it's an 8 cyl it most DEFINITELY will.
The nice part about those outdrives (270 & 280) is they are very
interchangeable and you can get a properly geared upper gearbox fro a 280 OR
270 and just slap it on (I am 99.999999% sure of this).
You also have issues with the transom plate. If he DOES have to upgrade the
outdrive (not change the gear ratio on the present) you are looking at a new
transom plate and likely fiberglass work. Not sure when the bell housing
starts to have a problem (or if is does) as the engines get bigger. I went
through a similar dilemma when I considered repowering my boat which has a
125a. Lets just say in the end fixing the 125a up was the best course of
action in my case. The boat is solid but too old and not worth a repower
job like is being discussed here.
It's not just a case of making sure the engine mounts match. That's an
easier problem to solve.
Although there are always reasons to keep a boat, generally speaking when
you want to move up in engine size on an older boat (I assume it's old since
it has a 125a) and it requires the kind of work proposed here, you are
better off selling and buying one with the right power.
Also, what is up with your 125a? dead? if not let me know, I might be
interested (although I may have talked you out of it!)
-M
"Greg Moore" <gmo...@datastore.ca> wrote in message
news:HeK8c.24518$A_2.1...@news20.bellglobal.com...
trainfan1
> A little bit of apples and oranges here Greg. I see you took the 280 a CI
> of the engine. You need to read it the other way The 280 refers to the
> outdrive, not the engine displacement, so there is no correlation between
> the 270 and 350. What he has is a 4 cyl Volvo engine (aq125) hooked up to a
> Volvo 270 outdrive.
>
> You could do a direct swap with any Volvo 4 cyl, like these aq125a, aq125b
> and the aq130. All of those will just bolt up and the gear ratio for the
> drive will be fine.
>
> The real question is what is a Volvo 740? If it's a 6 cyl, the drives gear
> ratio may have to be changed and if it's an 8 cyl it most DEFINITELY will.
> The nice part about those outdrives (270 & 280) is they are very
> interchangeable and you can get a properly geared upper gearbox fro a 280 OR
> 270 and just slap it on (I am 99.999999% sure of this).
>
Mike,
Won't the inline-6 Volvo bolt right up too? There's a smooth set-up for
you...
Rob
Mike Cleaves
case there are isues of room and clearance. Going to a longer motor (front
to back) woul ahve worked but nbeen impossible to work on. Anyone who's
doing something like this is kidding thmeselves if they think they can drop
it in and go.
-M
"trainfan1" <lmse...@usdatanet.net> wrote in message
news:dv6dnQ1ogap...@usadatanet.net...
tonycougar
<michael...@verizon.net> wrote:
>Although there are always reasons to keep a boat, generally speaking when
>you want to move up in engine size on an older boat (I assume it's old since
>it has a 125a) and it requires the kind of work proposed here, you are
>better off selling and buying one with the right power.
>
>Also, what is up with your 125a? dead? if not let me know, I might be
>interested (although I may have talked you out of it!)
>
>-M
Thanks for all the replies. My friend had an oppertunity to buy the
newer engine but I think he's just going to rebuild if necessary (was
left outside partially uncovered for 5 years, got the boat for free).
Probably just needs a good cleaning & fluid replacement.
rgall...@gmail.com
oldl...@gmail.com
oldl...@gmail.com
Tim
Aug 1oldl...@gmail.com
Probably not worth the effort. Here’s a lot of good material to look over.
https://www.baylinerownersclub.org/forum/current-topics-gc6/technical-discussion-gc12/229435-will-a-chevy-350-bolt-to-a-volvo-penta-270-outdrive-if-converted-for-marine-use-gctid658474