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  1. #16
    Senior Member ALX76's Avatar
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    Awesome looking boat, would love an inboard Holden powered speed boat myself.

  2. #17
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    Hi Brett,

    A bit long since this was posted but here goes.

    We recently bought a Ramsay Rebel very similar to the one you have pictured, we are unsure of age because nothing on the rego papers however the seller said around 1972 / 1974. Anyway we want this boat for travelling up and down the Hawksberry River, not towing skiers. Do you or can you obtain any advice on best prop for this purpose? Im not sure what is on it now but can easily find out if needed. My Dad purchased his first Ramsay off Les in Melbourne years ago for $4300, Les had it sitting on the floor and wasn't happy with it because it had a few pits in the Gelcoat up towards the bow, he ended up making a deal with Dad for $4300. Dad says they were all nice blokes down there. After seeing your name I thought you might be the best bloke to ask about prop size, Les certainly new his stuff!

    Heres the boat we just brought home to Coffs Harbour. https://www.youtube.com/watch?v=fsQgLRdDf3A

    Also left hand steer? Must have been a factory option maybe??

    Regards,
    Bill

  3. #18
    Senior Member cactus's Avatar
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    Hi Bill. What rpm at WOT now? Am guessing it would be best pushing a bigger prop ....maybe 12" x 15/16" with a bit of cup to keep the revs down for economy in your application.

    Great l'il hull you've got there. Get someone who knows them to show you how to do a 'spinout' or nose turn like a jet boat.....always a crowd/passenger pleaser ( can be a bit damp though!) !!!!!!!!!!
    Last edited by cactus; 30-11-2016 at 06:16 PM.

  4. #19
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    Right now I cannot say, I will give it a run on the weekend hopefully just bought it and got it home yesterday. It seems to be well looked after in very orignal condition. I live in Coffs Harbour and my good friend just bought a place on the Hawksberry River up 5 k's North of Spencer. Being a skier I love the Ramsay Boats so we went halves in this one when we saw it for sale. Just for refernce I had a old Lewis ski boat about 6 years ago I obtained cheap with a 272 Ford wide block V8 in it. I rebuilt that old engine but unfortunately it didn't have the puff to pull a footer around a turn and struggled getting 2 good skiers out. One thing i can remeber is being able to spin it round which i think you are refering to? It was a very similar looking hull and that was one feature it had that i loved haha.. Other than that it dissapointed me, the motor being the main culprit because it fell short of doing what you want a ski boat to do. Anyway thanks for your input, I will give it a run soon and be back in touch with revs and speed it's pulling as is now.

    Regards,
    Bill

  5. #20
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    Ok I ended up taking some advice from a eBay seller (wb_marine) who seemed to know his stuff. He said a 16" will be to big for a 308 motor and advised to go with his 12" x 15" Supaflow propeller which I did. Right now with this new prop it sits flat out on 4400 RPM doing 81 Kilometers and hour, and it cruises nice at 70 Kilometers an hour. Now the speed and revs are correct because I installed a new GPS Speedometer. My argument is that it still has plenty of power to rip a skier or two out, I have uploaded a youtube vid so you can see how easy it springs out of the water. In my opinion it could easily take a 12" x 16" prop and maybe even a 12" x 17"

    Maybe if somebody knows a bit about the 308 motors can help a bit here, any is welcome ;-) Here is the youtube video link: https://www.youtube.com/watch?v=jMJB3yz3ws4

    Also that last spin I do at the end of the clip before putting the boat back on the trailer, is that the trick your talking about? I love flipping these things around.

    The motor I believe is from the HQ Holdens and has 240HP. The carby on it is a 600 double pumper.

    Regards,
    Bill

  6. #21
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    Ok now I have the 12" x 16" which is plenty. Runs at approximately 3700 Revs doing roughly 78 KPH (1 or 2 km more or less depending on whether heading into the chop etc) measured from a precise GPS Speedo. It still takes off fairly easy but the 16" prop really brought the revs down. I can travel up and down the river at a comfortable 70 KPH without the engine revving it's head off which is now perfect ;-)

  7. #22
    Senior Member cactus's Avatar
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    Hi Bill. Looks like you've got the desired rpm/speed you were chasing for your application. Should be fairly economical at that.
    You could have achieved a similar outcome by having the 15" prop tuned or 'cupped" by a good prop man.
    Yes, that is what I meant by a ' nose turn '. It will be even more exciting as you gain more confidence in the hull and start doing them at higher speeds!!........that is, running along at75kph and cranking her over!!! You'll know you've done a good one when you take water over the bow!!!

    Not trying to tell you how to suck eggs here, but for what its worth, its also prudent to warm the engine up for 5 minutes or so rather than fanging it straight off the trailer. Give the engine oil a chance to do its intended job and help the donk to last a bit longer.
    Keep the sumps designed oil capacity at its max. level. (or even half a litre more). With the centremount's engine sitting at 14/15 degrees, the rear crankshaft throws are whipping shit out of the sump oil. This, combined with the inertia effect of pulling oil away from the sump pickup on tight turns, can lead to oil starvation to the top of the motor. Are you running an oil pressure gauge?

    You have a great l'il boat there. Many fun times ahead for you and your family and friends.

    Cheers, Cactus.
    Last edited by cactus; 11-01-2017 at 11:03 AM.

  8. #23
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    You may have the revs down to where you want but you are labouring the engine more.
    Your tests were done with just you in the boat...how does it perform with the family onboard, a loaded esky and some gear?

  9. #24
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    Thanks for the good advice & tips Cactus, I do warm the engines up first and had actually been on a run up the river prior to putting my boot into it :-) The motor sits on around 140 deg when working and comes back down when it isn't. I was told this Ramsay was made left hand drive so the motor could be sat in the same way it came out of the vehicle driving from the flywheel with all the original pulley setup on the front, apparently this also allowed it to run a 2nd water pump with the front seat being placed on the left side. Without thinking and giving the normal specs "Ramsay 308 with dog clutch" I was sent the wrong prop first. The prop dealer and myself had no idea some of these Ramsay's came out of the factory with motor around the correct way. Anyway all good now, and yes it has oil pressure gauge on the dash. There is only 2 gauges not working .. the fuel gauge which the needle jumps about and the water pressure speedo pickup broken off which I didn't bother fixing because I prefer GPS Speedometers.

    Rest assured it's a great little boat we will definitely get a lot of fun out of :-)

    Not sure of those nose spins at 75km but let's see as I get a bit better haha.

    Regards,
    Bill

  10. #25
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    Hi Ski,

    Last test was done with 3 adults in boat with full tank of juice from Kempsey NSW to South West Rocks on the Macleay River which took about 35 min from memory. The boat still pops out of the water easily, it feels to me it would rip one skier out but I won't know until I get down the Hawkesbury River in roughly one weeks time and give it a whirl just for the sake of knowing. I realize the motor is working harder at lower revs but you can instantly tell the motor is 5x times better off than revving at 4400 rpm doing the same speed, she just purrs along ever so nicely, I was quite impressed with the travelling performance. Once down the Hawkesbury River we will have full fuel and 5 or 6 adults in it and run it from up near Wisemans Ferry down to the mouth at Lion Island, I'm very interested in the sort of kilometers per litre of fuel the old girl will use. I will fill you in with both the specs running a heavy load & fuel consumption. Oh" also if it can still pull one skier out :-)

    Regards,
    Bill

  11. #26
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    Default Performs well with full load

    http://www.youtube.com/watch?v=KBauIc7vlHE&t=102s

    With a full load she doesn't really make much difference other than a bit of extra bog out of the hole, but she still gets up & out easy.

    Cruises along at true 75 km @ 3700 rpm

    We will put some yella terra heads on it when it is up for a rebuild, this is something we did to a EH ute with a 179 in it, extractors and exhaust straight out the side behind the door. It was one hell of an easy very noticeable performance gain, it went from a slug to a extremely enjoyable ute to drive!

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