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| Prop Size for One Lungers |
| Author |
Message |
    
Russ Whitford
| | Posted on Monday, August 25, 2003 - 10:13 am: | 
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I have been running a 1909 6hp Strauble in a 23ft surf boat and we have been getting used to each other.
After about 20 outings, I have come to the conclusion that the prop is too big. I think it is a 18" x 18" three blade but don't know for sure.
When I use the boat with one other person, the engine will "2 cycle" and run great. With a load of 8 people it is tempermental when I try to lean it to a 2 cycle run.
I am running gas with 32:1 straight 30 non-detergent oil. I have found that too much oil can be a problem too.
Would I be better off trying to use the oiler and running straight gas for more power or does this sound like a propeller problem?
This message board has been a help, hope someone has some ideas.
Russ
Milwaukee, WI |
veloce
| | Posted on Tuesday, August 26, 2003 - 11:54 am: |
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Here is a picture of the boat and motor.
Russ
\image |
veloce
| | Posted on Tuesday, August 26, 2003 - 11:58 am: |
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I'll try again.
Here is a picture of the boat and motor: \image(strauble)
Russ
Sorry for the mess, can someone walk me through posting an image?
Thanks |
andrew
| | Posted on Tuesday, August 26, 2003 - 02:19 pm: |
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Russ,
You almost got it... but instead of using the regular brackets "( )", you have to use the squiggly ones "{ }". Try again.
Regards,
Andrew |
veloce
| | Posted on Tuesday, August 26, 2003 - 08:35 pm: |
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Here is a picture of the boat:  |
J.B. Castagnos
| | Posted on Tuesday, August 26, 2003 - 10:00 pm: |
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Russ, that prop sounds big for a six hp if it's direct drive, how many rpms are you turning, what's it rated at. An 18" prop with no pitch would take a lot of hp. If your engine is in the 1000 rpm range I would try something around 15x15 or 16x16. It can turn a little over the rated rpm by yourself, you can hold it down a little, this way you can carry a load. |
Gregoryan
| | Posted on Wednesday, August 27, 2003 - 07:36 pm: |
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I have known of a sensitive carby that would actually change it's mixture with the trim of the boat! It was a Schebler and the spring plunger in the throat was too loose!?
Another observation with two strokes is the unpredictable running if air is leaking through the main bearings;,,it doesn;t know if it's rich or lean?!
What is the bore x stroke?
Gregoryan. |
brock
Member
Username: brock
Post Number: 4
Registered: 07-2015
| | Posted on Friday, July 24, 2015 - 10:23 am: |
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Do you guy know if any of you got a
Spare straubel carburetor mixer? For the museum I work at as an old Straubel engine and I'm only 13 years of age if so here's a number to contact 9062419610 |
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