need prop help for ’76 ski tique

James,
First, you have the wrong boat for lots of people. The Tique for skiing ideally should have the driver and the observer.
The numbers don't add up. You drop off one person and gain 600 RPM's? How do you know the engine is in good shape? Compression test? Your 4400 WOT isn't bad.
The Tiques came with 12" dia. props. I'm running a 12 X 13 O.J. on mine. 302, about 4400 WOT and I'd guess at around the 44 to the 45.
Where did the 11" dia. prop come from? The only CC's that ran them are the shorter (14'6") Atom skiers!!!

Larry, I'm not doubting you at all but the 11" dia. is a new one on me.

I did try the 13" Acme 540 and had the bad result.

James (or Larry) can you measure how much room you have between the hull and the O.D.

thanks for the info, i'm going to check the compression and timing. i'm also headed to the scales to see if i'm carrying the soaked foam under the floorboards syndrome, i pray not. i'll also check the space between the prop and the hull, and get back to you. the boat came to me with the current prop on it

thanks guys the 12x13 is a three blade right? ill look into the oj ones

While I've yet to see one personally in action, and esp being a fan of the 12x13 that Pete mentioned above, Acme is now making a 1210, which is a 12.5x12. It might not be too large depending on how much clearance your current set-up results in. This prop is somewhat new from Acme and was supposedly created to handle the 12" diameter requests, and Bruce from Midwest Correct Craft has installed one and said worked fine. I really wanted to know why it was 12.5" and not 12", but I think it's simply because cutting a 540 13x12 down to 12" resulted in not enough prop in terms of comparible bite to a 12x14 Federal-Michigan OEM replacement, and Acme unfortunately may not be up to providing a completely new design. Further along that line, Acme shows no 3-blade pitch in their RH line-up between 12 and 15", with the 15" props being used on the 1.23 set-ups. So there's no other prop they can cut the diameter down on. LH is a whole other ballgame with pitch options at 12.5, 12.625 etc.. I found all this out after winning the Acme prop certificate at the GL reunion and then talking to Bill Weeks in the weeks since. My personal goal now is to probably try one of those but have some additional cup put in as I feel for mine the typical 12.5x12 will still turn too many rpm and still. So maybe the 1210 (12.5x12) is worth a try for a standard 302 engine.      

Reid, interesting ACME is doing 12.5 diameter,

I currently run a 13x12 michigan on my 80 and get 2600rpms at 22mph while pulling a wakeboarder with 800lbs of added weight. I told my mechanic that I felt the boat needed at least 2800rpms to get more torque and pull better, he suggested I got a 12.5x12 instead of the ACME 542, I was even considering reworking my 13x12 into 12.5 diameter but fear ruining it and want to keep it as a spare.
how do you think this two propellers will compare???(1210 vs 542)

thanks for the help guys ill havve a look i like the legend and it is cheaper

thanks again for the discussion boys, when the cash comes out of the wallet for the prop, which won't happen till i pass the scale test and the compression test, it will be for the oj legend, ried and luch are onto some real fine tuning, but i don't want to be guinea pig just yet, all i want is the old tique to pull my arms out of the sockets on take off and from the input i'm getting legend boys like their prop on the tique just finei'll get back to you all after the next trip to the garage. the reference section came up with 449 lbs, for the trailer. i,m looking for 2049lbs, boat and trailer nobattery when i hit the scales.pray for no wet foam boys!

thanks mr. tique; what size is the acme 542? i'll explore that and the legend after the compression and weight jury come in, i don't have alot of room under there, it was 1 1/8inches from the 11inch prop to the bottom of the hull. moses

Tough call on this one. I loved the 12x13 OJ on my Skier- I think it has a better holeshot than the 12x14 Federals that I have. The results have been mixed on the 540/542 as far as vibration goes, but my feeling is that either would have a superior holeshot compared to the others. Top end might suffer a bit, though. For what its worth, Ive run what appears to be a 13" diameter prop on both my Skier and Ski Tique with no vibrations whatsoever. It has less than 1/2" of hull clearance with no ill effects to speak of.

thanks again for the input boys, i'll try the oj , hope to do compression check and weight this weekend. too chicken to try a 13 inch, my gel coat is pristine in the prop area. i'm gonna stick to the tried and true oj when i go out to buy the prop. moses

hello boys; iforgot to mention that when we towed the old ski tique to the land fill to weigh it with the old 69 dodge wagon ,the lady at the dump asked which was i dropping off , the car or the boat? to add insult to injury, on the way back to the shop the springs said bye bye on the trailer. thanks goodness i just bought a new set that are waiting on the table. iread the pumpkin patch pretty heavy, does any body have any pics of a tique floor on the site under the knife ? the nautique floor is a little different layout.i'll take plenty of pics of my surgery, but now i gotta go bye some baby powder to cover up in before i dive in. thanks for the guidance, you guys are great! moses

thanks very much pete for the picture. awesome wood work job.was that front foam the only thing dry in the foam dept. when you did that job?i came up with 2520 lbs. boat and trailer, which i subtracted 495 for the trailer. the boat should weigh 1600 no battery and no gas? am i on the rite track?i did preliminary surgery this afternoon and found very little to report in the wet foam dept. in the area just in front of the engine on the right side, i found the bottom 1/2 inch to be wet. towards the rear its not wet. i'm taking photos along the way.i'm not finding eureka yet, have i lost my mine and got the wrong numbers? the boys are telling me the old boat is crying with every cut. moses

James, I have some pics of my Tique during its reconstruction in my diary. I rebuilt it in the factory style.

1978 Ski Tique

James, all of my materials (incl foam) came from US Composites.