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Post by Jason b on Feb 8, 2021 17:02:46 GMT -5
Hey guys I have am 06 2660 center console I put wedges on it and just curious what height/ hole everyone runs there motors in I have twin 250 yamahas there in second from top now but seems to low any help would be great thanks
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Post by fishnfool on Feb 8, 2021 19:06:48 GMT -5
That's where the factory rigs them, 2nd lowest position. Just guessing here, but most (including me) likely leave them as-is.
The other issue is, the 2660 has a document tied history of suffering from ventilation in certain conditions, so while wedged can help with that, without a prop change, say going to 4 blades, raising the motors may cause more ventilation.
Motor height adjustment is a trial and error proposition.
I picked up Rev 4 4 blades with the intent of raising my motors but haven't gotten around to it. I was going to start with 1 hole higher to test.
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Post by schlnrnd on Feb 8, 2021 20:57:47 GMT -5
I have twin 200 Zukes on a 2009 2660. They are installed in the first hole. Occasional cavitation but hasn’t been bad enough to consider changing props.
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Post by Jason b on Feb 8, 2021 21:59:23 GMT -5
Yea I have rev 4 props on it so you are saying factory comes 3rd hole from the top or 2nd. I appreciate the help
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Post by fishnfool on Feb 8, 2021 22:10:03 GMT -5
Comes from the factory rigged at the second lowest setting.
If Rev 4s you might be able to get away with going up 2 holes, but again trial an error.
What pitch? What are your max RPMs at WOT?
If you're props are pitched such that you're getting max RPMs out of them, you might not be able to raise your motors without running the risk of over revving your motors at WOTs.
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Post by Jason b on Feb 9, 2021 8:42:20 GMT -5
I have 23 pitch blades rpm is in lower 5000 range. Maybe I'll just go up one hole and see what happens. What kind of toe in or out you guys have on the motors
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Post by fishnfool on Feb 9, 2021 9:02:20 GMT -5
Yamaha riggs the motors toe out. I've tried various positions including undoing my steering tie bar and letting the motors find their natural position.
I had mixed results, including lower top speed to motors ventilating more easily. I went back to the toe out configuration for best results. Yamaha seems to know what their doing here.
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Post by abouttime2fish on Feb 9, 2021 10:21:02 GMT -5
I asked sailfish about the toe and got a quick response back. Though that was in the pre-covid era.
I’ve got a 2360 with twin 150’s. The answer was 1/8 to 1/4” toe out. I’d messed mine up changing a steering ram without noting position before disassembly.
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Post by jski59 on Feb 9, 2021 10:56:45 GMT -5
I've played around a bunch with motor height, wedges and props on my old 2360 and current 2860...it's amazing what a little change can make. My 2860 until recently had 21p rev4s on F250s.
I've found the higher you go, the bigger affect toe seems to make. Ken at prop gods recommended 3/4 inch toe out (props closer) and that has worked well for me. I'm mounted in hole 3 (one down from the highest setting).
Sailfish don't seem to like the props too high or you'll get some ventilation, I assume due to the VDS hull. I've had my motors installed at the highest setting which was great in smooth conditions, but would ventilate in chop. The motors also seem to run a little hotter than normal at the top setting.
I was running Rev4s on my 2860, but am about to try some Bravo1s. The rev4s seem to lift the whole boat and make it kind of twitchy at cruise...this past summer I dinged a blade so I swapped the stock 3 blades on and preferred how the boat felt more settled and predictable. However I still like the bite of the 4 blades and low speed handling (I boat in a pretty busy area, so keeping the bow down in traffic is a priority). I'm hoping a bravo1 (which is more of a straight stern lifting prop) will be the answer. A 19p Eco would be the last prop I'd like to try.
I bet you'd be happier with a Powertech OFS4 or Bravo since that's a lot of stern weight on a 27 footer. Might need something in the 21p range to the rpms up, they should be in the 5700-6000 range with everything trimmed out.
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Post by reelkul on Feb 9, 2021 11:28:44 GMT -5
I have the same boat and same engines as you, 06 2660CC with twin F250s. I have settled on Powertech OFS4 with 21P blades. I am running the engines in the 2nd hole from top. I used to have 23P three blade props and I used to get a lot of ventilation. I played with the motor height, and nothing helped. The three blades were great on a flat day and the boat was a speed demon. WOT at 6000 RPM and 66mph. With the 4-blade Powertechs I top out at about 60mph and 5800 RPM. I never really go that fast. I typically run around the 40's. The 4 blade props make a huge difference in the stern lift and my ventilation issue is completely gone since switching to 4-blade.
If I see a set of used 20p 4-blade props I will buy them as I think that I can go even less pitch.
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Post by Jason b on Feb 9, 2021 14:23:36 GMT -5
I have the same boat and same engines as you, 06 2660CC with twin F250s. I have settled on Powertech OFS4 with 21P blades. I am running the engines in the 2nd hole from top. I used to have 23P three blade props and I used to get a lot of ventilation. I played with the motor height, and nothing helped. The three blades were great on a flat day and the boat was a speed demon. WOT at 6000 RPM and 66mph. With the 4-blade Powertechs I top out at about 60mph and 5800 RPM. I never really go that fast. I typically run around the 40's. The 4 blade props make a huge difference in the stern lift and my ventilation issue is completely gone since switching to 4-blade. If I see a set of used 20p 4-blade props I will buy them as I think that I can go even less pitch. so do you think with the less pitch you don't get the ventilation as bad less pitch means slower correct? I offshore alot and coming back in the inlet gets intense when your trying to stay with the waves and the damn boat ventilates. I like the speed and never have a problem but you get in strong current slow speeds they brake loose
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