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Old 01-31-2020, 05:18 PM   #12736
Diaphone Jim
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My BSA Gold Star (500 cc/ 30 cu in) had 42 hp, a figure which started in the '
40's.
My '57 AC Bristol had 120 hp from 120 cu in.
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Old 01-31-2020, 08:52 PM   #12737
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#catnip4tw
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Old 02-01-2020, 12:23 AM   #12738
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You can hardly compare a hand built 7000 rpm performance bike with a production outboard motor on cost alone. Can't compare it to passenger cars either. Was that rating in the post war period or in the '50s ? The AC Bristol was again a performance machine but it was 10 years later which makes a world of difference. I had a 149 ci Chrysler that put out 215 hp but that was in this century, a world away from the 40's.
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Old 02-01-2020, 11:50 AM   #12739
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7000 surprises me. Maybe that's why your arms went numb at freeway speeds. That's a lot of piston reciprocating.
Torque was under 5000, I think.
A wonderful handful on dirt or pavement!
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Old 02-01-2020, 11:18 PM   #12740
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Sure they are looking for torque because that does the work, but with an outboard motor traction is kind of iffy.
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Old 02-02-2020, 12:30 PM   #12741
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http://www.pochefamily.org/outboard/...mpression.html

I told you I don't know squat about them but these guys say:

"Most small horsepower (up to 25 hp) two-cycle outboards built prior to the 1960s had a compression ratio of about 6 to 1."

Kind of a neat article in general.
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Old 02-02-2020, 03:21 PM   #12742
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I didn't see any spec that said it was two or four cycle but I think the outboards of that era were mostly two cycle. I did not know to ground the plug wire when doing a compression test with a coil ignition, it's not necessary with a magneto. In addition to a compression test a leak down test is a good idea.
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Old 02-13-2020, 02:48 AM   #12743
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Beau = boyfriend and you can get the football player with Beau Catcher Shoes from Red Goose.
Twisting heads for profit, the Madmen's stock and trade.
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