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burdiejr 
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Joined: May-01-2007 Location: United States Status: Offline Points: 23 |
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 Topic: powerPosted: August-06-2007 at 3:29pm |
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i have a 71 nautique and this past weekend we finally put it to the test. loaded with 7 people and attempted to wake board...it was a dog. what can i do to improve power. i have a 351 at home...there is a 302 in it now. i'd like to have plenty of power to pull and i dont know what prop is on it...i can look and repost. all help will be grateful
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its always fun till someone gets hurt then its hilarious |
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TRBenj
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Joined: June-29-2005 Location: NWCT Status: Offline Points: 21132 |
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Posted: August-06-2007 at 3:55pm |
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I dont know how you fit 7 people into a boat that size, Im not surprised it struggled. The 302 is a fine motor and there are many things that can be done to increase power. The first thing to do is to get the right prop on it though. Do you wakeboard exlusively?
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burdiejr
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Posted: August-06-2007 at 8:24pm |
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i do mostly wakeboard....some tubing and some general lake cruising. we looked like hispanics all piled up. they all sat along the sides
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its always fun till someone gets hurt then its hilarious |
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Luchog
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Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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Posted: August-06-2007 at 9:07pm |
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The 302 is a nice engine, but with a 351 you have like +50 HP and some extra torque too.
I dont know if you can fit a 351 in that boat anyway. What I do know, is that you can work out miracles with the right propeller. |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Posted: August-06-2007 at 9:17pm |
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The big engines in the 71 Nautique were the 351 Holman Moody and the 350 OMC.
Do check what prop is on the boat. |
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MaddMarxx
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Joined: June-29-2006 Location: United States Status: Offline Points: 1741 |
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Posted: August-06-2007 at 9:28pm |
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If you had no more then 4 people in the boat, it may have a fair amount of power and should still make a nice wake!
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Posted: August-06-2007 at 10:06pm |
I couldn't agree more. I feel it was a very unfair test to take it out for the first time, pile 7 people in it and then call it a dog. You really need to get some more time in on the boat to learn what it is capable of. The 302 really isn't a small engine given the size and weight of the boat. |
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Luchog
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Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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Posted: August-06-2007 at 10:31pm |
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On my 80 SN with 3 people sitted on front, one over the doghouse and a 200lbs fat sack between the Dhouse and the transom seat the wake gets incredible and it pulls really nice with an old 13x12 Michigan prop.
Im wondering if it's worth getting an Acme 540 or 542 and if I could add some more weight then. |
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GottaSki
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Joined: April-21-2005 Location: NE CT Status: Offline Points: 3335 |
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Posted: August-07-2007 at 10:54am |
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The 302 is a short-stroke engine so likely its missing the low grunt of a 351 at boarding rpms. Plus the heavy boat and 7 fatsaks, not surprised its sluggy even if its state of tune was spot-on. The 302 shines at with more rpm.
Consider a new prop if thats whay your doing with it. |
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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79Tique
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Joined: September-04-2006 Location: United States Status: Offline Points: 380 |
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Posted: August-07-2007 at 2:20pm |
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I have a Tique with the 302, the Acme 542 prop really improved the pull for wake boarding. However even with the stock prop my 302 would pull up a slalom skier nicely and wake boarders were up very easy. The 542 just makes speed control nicer. You may want to check the engine tune before anything.
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Work to live, not live to work.
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68lemans
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Joined: January-31-2006 Location: United States Status: Offline Points: 105 |
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Posted: August-07-2007 at 3:00pm |
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In my 72 we ride with 7 to 9 people in the boat and it still pulls pretty good (not near as well as it pulls with 2 or 3 people but it is no where near the same wake) It has a 351 HM that is very strong! I still have the original prop on, I am thinking of getting a new prop but I am just not sure what to get? What do you guys think, I know the HM had 290hp stock and it is bored and has a different cam in it so I would say I am up in 315hp range, so what prop? We just use the boat for wakeboarding, actually now that I think of it I have had the boat for 2 years and there has never been a ski in the boat, or a tube I hate to say that because some of you guys will probably hate me now, knowing that I don't ski
B |
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reidp
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Joined: December-06-2003 Location: Mooresville, NC Status: Offline Points: 1804 |
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Posted: August-07-2007 at 3:10pm |
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Burdie,
If the engine is healthy and will turn up to 4500+/- with just a driver, then your current prop size is probably OK. If it doesn't reach that RPM range, then you're more than likely overpropped. Pull it and let us know. But even with the correct prop it doesn't necessarily mean it's going to pull well with 7 guys on board. If you plan to have large numbers in the boat often, then you can prop the boat to pull much, much better, BUT, and this is huge but, you will have the tradeoff of the engine having the capacity of turning way beyond its max rpm at full throttle with no load. You would have to consciencely restrain from turning the engine over 4500 rpm or else pay the penalty of a blown engine. |
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79nautique
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Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Posted: August-07-2007 at 6:16pm |
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7 and 9 people are you trying to sink the boat way overloaded. cap is aroung 850 lbs including gear. Very foolish operating your boats in that manner.
Also I questiion if it is a SN being that it only has a 302 those usually came in the smaller mustang's and tique's |
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GottaSki
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Joined: April-21-2005 Location: NE CT Status: Offline Points: 3335 |
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Posted: August-07-2007 at 6:31pm |
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Ya, I'm sure the're not all lined up sitting on the gunnell waiting to get knocked off, clunk their clooney and sink out of reach in the blackness..
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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TRBenj
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Joined: June-29-2005 Location: NWCT Status: Offline Points: 21132 |
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Posted: August-07-2007 at 6:36pm |
It's only a '71, so the 302 came in many of those boats- Gary's '72 promo has a 302 as well. |
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68lemans
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Posted: August-07-2007 at 6:54pm |
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79 my boat is rated for 9 people at 150 lbs or a total weight of 1500 lbs with gear.
So I don't think it is that foolish! It still has plenty of power and can still turn on a dime. B |
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burdiejr
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Joined: May-01-2007 Location: United States Status: Offline Points: 23 |
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Posted: August-08-2007 at 1:19am |
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let me get all my info together as far as my prop etc. i do know it will turn over 4500 rpms ok wiht no problem. let me get back to the boat and i'll re-post
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its always fun till someone gets hurt then its hilarious |
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MaddMarxx wrote: