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frank_petran
Senior Member
Username: frank_petran
Post Number: 52
Registered: 05-2009
| | Posted on Saturday, July 18, 2009 - 09:08 am: | 
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Is there any listing of horsepower in relation to engine size (bore and stroke) for Acadia engines? As there isn't a tag on the flywheel of my engine how does one go about determining the horsepower rating and at what rpm. Is there any listing of operating ranges? I know 900 rpm is probably on the high side so I'm thinking 500 to 850 as a safe range.
Thanks, Frank |
puttputtputt
Member
Username: puttputtputt
Post Number: 5
Registered: 02-2009
| | Posted on Saturday, July 18, 2009 - 08:36 pm: |
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Here is the info from the Acadia catalog #10
3HP make'n'break has 4" bore and 3.5" stroke.
4HP make'n'break has 4" bore and 4" stroke.
5HP jump spark has 4" bore and 4" stroke.
Another 5HP model with make'n'break or jump spark has 4.5" bore and 5" stroke. This model has a 1.625" crankshaft.
6HP make'n'break or jump spark has 5" bore and 5" stroke.
6.5HP make'n'break or jumps park has 5.5" bore and 5" stroke.
8HP make'n'break or jump spark has 5.5" bore and 6" stroke.
Those are the popular sized engines; if you need info on the larger models, let me know. |
richardday
Senior Member
Username: richardday
Post Number: 777
Registered: 11-2003
| | Posted on Monday, July 20, 2009 - 12:43 pm: |
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Another factor creeps in and that is how well counter balanced the crankshaft rod and piston in a single cylnder engine. In some cases the upper limit on shaft rotating speed had more to do with the stress on the hull. Around the Chesapeake Bay in the early years where large one lungers were commonly used there was a practice of every few years during the winter cutting enough "Eastern Shore Mahogany" (Southern Yellow Pine)for a replacement hull. The next winter building a replacement hull. Remove all the good metal from the old hull and reinstalling it in the new hull. Getting 15 years from a hull was considered a real triumph. Unfortunately there is little if any Southern Yellow Pine around this area any more. |
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