Author Topic: You can call me skegless (Read 26658 times)

still_fishin · « **Reply #60 on:** August 24, 2015, 07:20:36 PM »

No, I didn't sell it. The Intimidator has a nose cone. The 18 does not.

CVX Fever · « **Reply #61 on:** August 24, 2015, 08:23:28 PM »

Quote

I don't think I'm going to have time this year but early next year I will take the drive off my CVX18 and do a full speed run with both drives so we can put this to rest. I'll just change the drives in the parking lot.

Cool idea Tim! My money is on the stock drive as being the fastest. Here's a guy that stuck a nose cone his alpha drive and lost 5 MPH.

http://checkmate-boats.com/forums/archive/index.php/t-9526.html

V153 · « **Reply #62 on:** August 24, 2015, 09:08:13 PM »

Less'n yer gonna raise the X dimension. All you're doing with a nose cone is increasing the size/overall displacement of the gearcase.

Plugcheck · « **Reply #63 on:** August 26, 2015, 08:05:44 AM »

No nose cone, from I have learned the timi may benefit due to the higher x dim and v hull, but not the Cvx hull. Got the drive back on, and set tonight's score on the propshaft. It's a merc trophy in 25p. Smaller diameter, but I have Thru hull exhaust so ventilation should not be an issue. You may notice the trim tab will need some clearancing. Hope to try it out this Sunday.

Plugcheck · « **Reply #64 on:** August 26, 2015, 08:11:07 AM »

Here is the photo of the completed skeg/prop repairs. Could not post with previous posting, it just would not go through.

Hyperacme · « **Reply #65 on:** August 26, 2015, 08:14:01 AM »

Do you need that tab if you have power steering ?

Plugcheck · « **Reply #66 on:** August 26, 2015, 08:27:31 AM »

Well, that is a very good question. Before I had nothing but a big open hole where a trim tab or coverplate used to be. Even with power steering, I found that at WOT the steering wheel pulled hard to the left. I later found an issue with the PS reservoir being near empty, but also added a trim tab at the same time. Not certain which was more instrumental in the actual corrective action, but at WOT the steering is neutral, in fact fairly neutral through all the rpm range. I did notice a bit less ventilation/cavitation when the trim tab is in place, so it remains for now. I will probably take an old one to modify as the current tab is new.

Hyperacme · « **Reply #67 on:** August 26, 2015, 08:50:05 AM »

I know for outboard they make a "Set back" tab.
Maybe one style/size of tab fits both I/O's and outboards ?

dorelse · « **Reply #68 on:** August 26, 2015, 09:09:42 AM »

You definitely don't need the tab with power steering...I ground my completely flat to fill the void. I would track straight as an arrow if you let go of the steering wheel a WOT...no pull either direction.

Diamond Chad · « **Reply #69 on:** August 26, 2015, 10:09:49 AM »

Mine was removed on the 18 when I got it. No steering issues at speed. I found a blank filler plate in stock at West Marine. Guess the metal serves as an anode and will sacrifice its metal to electrolysis before the drive housing. Probably just a salt water concern anyhow, but it makes for a nice finished look.

http://www.westmarine.com/buy/mercury-marine--mercury-mercruiser-76214q5-new-style-flat-trim-tab-zinc-anode--4531372

Plugcheck · « **Reply #70 on:** August 26, 2015, 01:30:32 PM »

I found one in my collection of parts that is rather pitted, I think with some machining it could plug the hole and offer some cathodic protection. Also saves my new tab for the future. I may smooth it off and hope for the best steering wise. Thanks for the advice.

MarkS · « **Reply #71 on:** August 26, 2015, 02:44:59 PM »

I would think the open hole (when running without it) would cause some turbulence in the prop area?

Plugcheck · « **Reply #72 on:** August 26, 2015, 11:52:53 PM »

Instead of cutting the new tab, or doing the same with the old tab, I thought I would give the flat disk a try. Stole it(OK borrowed sounds better) from the timi, a quick clean up, and install. Put the new prop on, looking forward to see how it performs. Excited to feel how this prop has greater stern lift than a three blade. Might even have to lake test Saturday before river run.

Plugcheck · « **Reply #73 on:** August 26, 2015, 11:59:02 PM »

Whoops, sorry a pic would help.

Jason · « **Reply #74 on:** August 27, 2015, 06:14:34 AM »

That's my set up too. Rev 4 prop and flat tab. No issues.

Plugcheck · « **Reply #75 on:** August 27, 2015, 07:52:26 AM »

It's a Mercury trophy, was on a 200hp OB Ranger bass boat. According to owner did 74mph. Smaller than the drive case on mine, but since I have no exhaust thru it, it should be OK. We shall know soon enough. BTW Jason, is your Rev 4 on your 23 I assume? Curious to know what pitch you running. My new one is 25p, same as the 3 blade, and I have found info that states I should go down 1 or 2 in pitch when going to four blade.

kert0307 · « **Reply #76 on:** August 27, 2015, 08:34:56 AM »

I run a 4 bladed 22p Stiletto on my cvx16 with the v8. I also have a 3 bladed 23 as well (mercury vengence, similar to laser2). I have a 3 bladed 25p, but it makes the boat pretty doggy off the line and even though I've gotten the best speed out of it, my rpms aren't where I would like.

I'm interested to hear if your boat is still a wheelie machine now.

Jason · « **Reply #77 on:** August 27, 2015, 11:42:48 AM »

Yep. On the 23. It's a 21p and took a year to find at an affordable price. Pretty happy with it so far.

MarkS · « **Reply #78 on:** August 28, 2015, 09:29:57 AM »

Quote from: Plugcheck on August 27, 2015, 07:52:26 AM

............ and I have found info that states I should go down 1 or 2 in pitch when going to four blade.

I have read that too, but later found out that many of the four blade props were 1/2" smaller diameter than the three bladed versions so that you didn't have to drop down a size in pitch?

Easthaven · « **Reply #79 on:** August 30, 2015, 06:21:11 PM »

Guys! That looks nasty! I'm afraid to ride out in that stuff now! Anybody got fish/depth finders in their boats? Would that help much doing 20-30mph? Yikes! Sorry guys!