| Author |
Message |
    
jason thompson
Member
Username: jasonthompson
Post Number: 8
Registered: 08-2009
| | Posted on Monday, October 26, 2009 - 10:20 pm: | 
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I hit a sidewalk LOL yes a sidewalk in the lake never been on the lake before and just put my 36 footer in and it was flooded I went around the hazard marker on the handrail just to fing out the COE didnt mark the 30 foot sidewalk pier past the railing.. Now vibration curled props...
They are 18x21 I real want to lower my rpm at the 10 to 12 mph range that is about all i go and what would i need??? I found a set of 18x18 brass props the same shaft as my v-drive but wouldnt that increase my rpm or do i need to just have mine refurbished because it is the best for just getting aroun the lake.. I dont care about holeshot. And my boat never planes it just plows. It is a 71 whitcraft river cruiser ? motor yahtshould it plane?? what should i do |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 7013
Registered: 09-2003
| | Posted on Tuesday, October 27, 2009 - 06:28 am: |
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Hummm... Interesting question. My knee jerk reaction is to use lower pitch props (like that 18 pitch) to keep the motors from lugging, but that doesn't seem to be your issue. Seeing you don't plane off, how about this: Go way lower on the pitch and run just one engine. This will save gas and, with a lot lower pitch, the engine will not be damaged. (Alternate engines on the way back.)
We did this at our old marina since there was a 2 mile No Wake Zone. Ran both engines until under way, for easier handling, then shut one down until we cleared the slow zone. I ran the other engine coming back to even out the fuel tanks.
Jeff
PS: If you go this way, consult your tranny manual to see if that's okay. With my Velvet Drives, the dead shaft can turn all day without damaging the tranny. |
Peter McWilliams
Member
Username: pete31
Post Number: 77
Registered: 04-2008
| | Posted on Tuesday, October 27, 2009 - 06:07 pm: |
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what about 4 blades? |
Peter McWilliams
Member
Username: pete31
Post Number: 78
Registered: 04-2008
| | Posted on Tuesday, October 27, 2009 - 06:14 pm: |
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Have a look here Jason...http://www.magnumpropeller.com/page/page/5352487.htm |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 7022
Registered: 09-2003
| | Posted on Wednesday, October 28, 2009 - 02:13 am: |
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Four blades would be good, too.
Jeff |
jason thompson
Member
Username: jasonthompson
Post Number: 11
Registered: 08-2009
| | Posted on Wednesday, October 28, 2009 - 09:04 pm: |
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I found a perfect used set of 18x18 4 blade props for 350 does those sound good..
Also i gave 15000 for the boat pictured above did I do good??? |
Peter McWilliams
Member
Username: pete31
Post Number: 79
Registered: 04-2008
| | Posted on Wednesday, October 28, 2009 - 09:58 pm: |
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$350 for a set of 4 blades, thats a good deal. You will notice a difference over 3 blades, much more responsive. As for what you paid..let me ask you this..does it put a huge smile on your face every time you step aboard? is your worst day on the boat better than your best day at work?..if you answered yes to either question then price is irrelevant
Pete |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 7032
Registered: 09-2003
| | Posted on Thursday, October 29, 2009 - 06:40 am: |
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Fastjeff's Law of Propellers: An 18 pitch 3 blade equals a 17 pitch 4 blade. (Or, to put it the other way around, those 18 pitch 4 bladers are equivalent to a 19 pitch 3 blader.)
But you got a good deal on both the boat and the props.
Jeff
PS: If it were me, I'd eBay the 4 bladers and get your present props de-pitched (remove pitch) as far as they can go. I'd then run on one engine IF your transmissions allow it (which most do). |
jason thompson
Member
Username: jasonthompson
Post Number: 12
Registered: 08-2009
| | Posted on Wednesday, November 04, 2009 - 09:37 am: |
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http://cgi.ebay.com/ebaymotors/SET-OF-2-BRASS-PROPS-18RH-19-18LH-19-USED-GOOD-CO ND_W0QQitemZ150386031467QQcmdZViewItemQQptZBoat_Parts_Accessories_Gear?hash=item 2303b4bb6b
What About These Jeff looks like I may get a good deal on them. My other props are nicked up pretty bad and out of ballance would cost a $$$$ to rework prob woth more scap weight lol. |
jason thompson
Member
Username: jasonthompson
Post Number: 13
Registered: 08-2009
| | Posted on Wednesday, November 04, 2009 - 06:15 pm: |
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Also those props he said he measured and it was a inch front and inch and 3/16ths in back Would you say that is prob the 1 1/2 shaft or do they make one that size thanks |
jason thompson
Member
Username: jasonthompson
Post Number: 14
Registered: 08-2009
| | Posted on Wednesday, November 04, 2009 - 10:22 pm: |
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I measured mine and they are 1 inch in the front and looks to be 1 1/4 in the front does that sound right.. So I would say I am 1 14 shaft ??? this is confusing trying to buy blind thanks jason |
