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4 strokes for a Cat - Page 7
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Thread: 4 strokes for a Cat

  1. #91
    Ausfish Silver Member
    Join Date
    Jun 2006

    Re: 4 strokes for a Cat

    Quote Originally Posted by Kerry
    And obviously you've a workshop jock and never had to pull the plugs at sea See you have too look beyond all the brochures and gooble gook sales blurbs as the real world is something quite different.
    Quote Originally Posted by Kerry
    In the meantime don't continue bleating about KC's you've shown you know jack schitt about 'em, fitted a few so what! no big deal and 140 anything's on a 2400 is nothing more than a "holeshot" wank!
    Quote Originally Posted by Kerry
    ....offset driveshaft so you can swing larger diameter props to give better holeshot and superior thrust (great for cats)....
    Your not all that clued up on Cats are you
    Says Kerry who does what for a living???

  2. #92
    Ausfish Silver Member
    Join Date
    Jun 2006

    Re: 4 strokes for a Cat

    Quote Originally Posted by fly_1
    I raised this topic a few months ago, and after lots of research etc, I decided to repower my 5.2m Kevlacat. I have just put the boat in for its first service after the repower, and thought I would fill you in on the performance/details etc. Its got 2006 model EFI High Thrust 60hp Yamahas onit, and it goes bloody well! Compared to the 2 strokes (70 hp yamahas), its performance out of the hole is almost as good, I get 30kts WOT, and cruises around the 23-25kt mark at around 4500- 4700rpm. These power settings are almost identical to the 70hp 2 strokes. WOT is reving out at 5800rpm (target from yamaha is between 5300-6000rpm).
    We have changed the original dinner plate sized props with 15 inch alloys ( at the moment), although after speaking to a few guys from the fishing club, I may put a couple of solas s/steel ones onit.
    The ultimate test was a few weekends ago, when we went over to Tangalooma for the day with my brother and his boat. His boat, "Tanjian", is an identical 5.2m kevlacat with 70hp 2 strokes onit. It has identical fuel tank size, and set up, so it was a perfect comparison between the two. Heath had 2 extra people in his boat, but otherwise we were pretty much identical.
    After crossing the bar at Caloundra, we headed straight out towards Moreton.We both sat on about 24kts all the way. The first big thing we all noticed was the noise!! Or lack of it with the 4 strokes!! We, ( on Obsession) were able to listen to the stereo all the way over, compared to the crew in Tanjian who had to yell at each other everytime they wanted to speak.
    We went from Caloundra bar across to Moreton, cruised around the wrecks for a swim etc, then down to the resort for lunch and a few more drinks. Then it was back up the inside of the passage through the narrows back to the ramp at the coast guard.
    We filled both boats straight away, and the results were amazing!! Heath put 120l in Tanjian, and I put the grand total of 68l in mine!!! Almost half, which surprised the bloody lot of us.
    A couple of days later, we loaded the boats up and headed out to the banks for a snapper session. Same boats, same weights etc , and the same results. ( By the way, we both got a heap of snapper as well!!)
    So overall, I am very happy with the boat and performance I am getting with the new donks.
    I know there was a few other blokes looking at doing the repower as well, and all I can say is do it!!! You wont be dissapointed!!
    I wouldnt be surprised if the brother also does it to Tanjian in the very near future.

    Regards

    Trent
    As I mentioned about the 60 Yamie High Thrusts earlier which according to Kerry just give "holeshot w@nk."

    Quote Originally Posted by Kopey
    Holeshot refers to the speed at which a boat comes out of the water on plane from standing start. The ability to swing larger diameter props does make a difference in a cat application, just ask any of the VMR skippers here, the difference with the 16" dia props as opposed to what the 225 Yamies previously had was big. You'll probably find people on here that use motors with big foots for cat applications i.e 60 Yamie 4 strk High Thrust, same pricinple.

    So how many cats have you fitted out recently Kerry?
    Comment made directly after:

    Quote Originally Posted by Kerry
    This fixation with "holeshots" and wanting to run bigger props for thrust? especially where Cats are involved and especially with ones that do a lot of towing is pure americanised BS.

    "Holeshots" can't stand the term >


  3. #93

    Re: 4 strokes for a Cat

    well well, it seems some people are prepared to not only show their true colours, but back them up as well.

    Kopey, as far as Kerry is concerned, he is a very smart man. way too smart for you and i to even comprehend. unfortunately he is also a bit of a toss who prefers instead to use his wisdom to intimidate and harrass others.
    Shame really, i feel he could be really helpfull if he wasn't so upset at someone or something all the time.

    now, he will come back and say that he is only reacting to everyone elses conceived stupidity (me included, and anyone who doesn't know as much or agree with him).

    so c'mon Kerry, its obvious to a fool like me that Kopey is a young guy who loves boats and has been able to amass quite a bit of knowledge about them in his early years, and has formed opinions based on what he has experienced.
    Personnaly, i don't don't blame him for being biased towards Suzi's. i don't and have never owned one, but if i had the option, i would get a df140 tomorrow. Its fine to label them crap if you want, but all things being relative, tell me what they are crap compared to? What beats them hands down.

    Kerry, i just think you could be a bit more constructive with what you have to say, instead of coming out like a cornered badger in heavy period.

    and pls, before you respond to anything else, give us a bit of background on what you do for a living. You never know, just might help your cause.

    Damo
    Give a man a fish, and he'll eat for a day. But ,flogging him into submission will result in him taking up crabbing.... and once he gets a taste of that sh*t, well, he may never return again.

  4. #94
    Ausfish Silver Member
    Join Date
    Jun 2006

    Re: 4 strokes for a Cat

    Anyone here read back on Kerry's posts on this thread and tell me what he's said that is of any use, is informative, or shows he knows what he's actually talking about.



  5. #95

    Re: 4 strokes for a Cat

    Kopey, often i think he really does know what he's talking about. but he is just not a good communicator, if you know what i mean.

    Damo

    Give a man a fish, and he'll eat for a day. But ,flogging him into submission will result in him taking up crabbing.... and once he gets a taste of that sh*t, well, he may never return again.

  6. #96

    Re: 4 strokes for a Cat

    and pls, before you respond to anything else, give us a bit of background on what you do for a living. You never know, just might help your cause.
    Not a dam thing to do with you either Deiter but my advice is when all else fails don't start with the smart ar$e attitude, that's not any better than your mate. Your just being narky and that's your problem.

    But the thing you obviously don't understand either Deiter is a 2400 KC does not require 140's, was never really designed for that power and people who think they require 140's are only in it for the holeshot wank. You know the types who think they always have to be in front.

    A 2400 is ideally suited to 115's and can actually use that power properly but in the case of suzzie the 115 is a stretched 90, which is a bit ar$e about face with other makes as the bottom end of the HP bracket in any engine is always going to be the better option.

    'ol kopey here has says a lot of different things but can't even justify them to himself, reckon 115's go good on 28' 3.5 tonne powercats and yet thinks a 2400KC requires 140's, load of crap Deiter! Probably both of you need a bit of sea experience in a Cat to know the difference.

    And if my memory serves me correct? Did someone mention what the top speed of the 2400 with 140's was? Tell me again

    Regards, Kerry.

  7. #97

    Re: 4 strokes for a Cat

    Kerry, if I was to spend that much on a 2400 KC I would opt for the maximum rated HP, would prefer to be overpowered than to struggle along with a belly full of fuel, esky full of beer and 6 blokes on board.

    Just my opinion

  8. #98

    Re: 4 strokes for a Cat

    Leezor, If you did spend that much of a 2400 then you would realize that the 140's were a waste of space even with the bigger fuel tank option. I can guarantee you a 2400 with 500 litres does not struggle with 115's. Some of the 2300's that were fitted with 140's was simply a waste of power on just about every day of the week.

    An interesting comparison is the 2100 with 70 4S, which goes well, yet for an extra foot they think they need twice the HP?

    For the DF140 engine nobody as yet has been able to indicate at what RPM this HP is achieved. WOT rev range is not an indication of where max HP is reached. Running a 4S is entirely different to a 2S as revs don't really worry a 2S but none of the 4S's are meant to run full bikkie.

  9. #99

    Re: 4 strokes for a Cat

    I suppose you over power cats when under powering them will cost you nearly the same or more if it is a different brand.
    Overpowering , not much point unless the advantages outway the disadvantages.
    I think some owners out there did there homework ( which they do)
    before they parted with the cold hard cash that we don't seem to have anymore.
    Note I tried not to refer to any particular brand name.
    I love 4 strokers but at the moment I have 2 stroke black anchors.
    When some cold hard ones come along , I'll be buying me some
    4 strokers that best suit my needs .
    Not from some advertising gimic etc.....
    I think Kopey is well aware of the above .
    I think some people who use this site are not....
    Ta....


  10. #100

    Re: 4 strokes for a Cat

    In the mid 90's we had a 328 Powercat with twin 165hp Diesels, and it always felt underpowered. The 165's where the minimum rec and it wasn't until a few years down the track they came out standard with the 200hp.
    From this experience I would prefer to spend more up front and be overpowered than have to repower because it saved a few bucks initially.
    Again, this is my opinion and am speaking from my personal experience.

    Cheers,

    Lee

  11. #101
    Ausfish Silver Member
    Join Date
    Jun 2006

    Re: 4 strokes for a Cat

    Quote Originally Posted by Kerry
    'ol kopey here has says a lot of different things but can't even justify them to himself, reckon 115's go good on 28' 3.5 tonne powercats and yet thinks a 2400KC requires 140's, load of crap Deiter! Probably both of you need a bit of sea experience in a Cat to know the difference.
    If customer's want to go put 2 x DF140's on they're Kevlacats for which their rated to then why the f#@! cant they? Where here have I said that KC2400's need 2 x DF140's. Where does a tosser liker you get off on making all this BS up???

    What does this so called expert do for a living???

  12. #102
    Ausfish Silver Member
    Join Date
    Jun 2006

    Re: 4 strokes for a Cat

    Perhaps I should talk to my mate Dan here who actually owns one of these KC2400 with 2 X DF140's and you can explain to him why his set up is as you are trying to say "unbalanced," or some BS like that.

    Quote Originally Posted by Kerry
    Well seeing you had "fitted" all these 140's I thought you might have known? So it's all to do with speed then? and in any case you wouldn't be running 100's but 115's as the 130/140's that a few KC were fitted with really were not "balanced" at all. For sure go like a scalded cat but totally wasted.

  13. #103
    Ausfish Platinum Member JB's Avatar
    Join Date
    Dec 2003

    Re: 4 strokes for a Cat

    HA, "Kerry" thought u left mate, why dont u do everyone a favour and just piss off again.

  14. #104
    seafarer3
    Guest

    Re: 4 strokes for a Cat

    Hey Julian 1,

    Our 21 ft cuddy cab Noosa Cat ( VMR JACOB'S WELL ) had 2 x 140 Suzy's
    behind her.
    There was good power to weight performance.
    We only went to 150's for the towing side of it...
    Hope this helps

    Cheers
    Scott

  15. #105

    Re: 4 strokes for a Cat

    hehe I love these types of threads.......


    PS. I love the holeshot of my Cruisecraft with a 175 yammie on ass
    Heath
    Gold Coast
    WWW.GCFISHING.COM

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