I know nothing about the RX4's Kev, but a 20" sounds way too big for a 1.85 ratio donk(?) on a boat that is hard to push (slowish), and a donk that is recommended to achieve ~5800 heavy trim!
Will need to crunch some numbers to confirm my suspicions, but it's too late now, gotta catch some zzz's.
Cheers
Brendon
Developed by BRP specifically for the Gen 2's. With the exception of a few of the really high speed bass boats, these seem to be the props almost every Gen 2 is running and the 18 was first pick due to the type and weight of hull. It is expected to be the right prop.
Do you know what size and type of prop got you your 37mph @5500 Kev? This data is from your boat, and although there are some questions re 'was there any contributing factors to why the speed was seemingly down', this known data from your boat is by far the best method to make an educated guess as to what pitch range will best suit the new 3-hungy beast.
The G2's gear ratio is turning its prop 8% faster than the F250 at the same revs, so straight away you need 17% more power to push the same size prop at the same engine revs (assuming slip remains the same).
Cheers
Will see if I can find the "numbers' for the old prop.
Kev
She's on. Still all the rigging and electronics to go but a good start. Chubby=)
KC
Looks the goods.
Be interesting to see if the motor is at the correct height first up.
Cheers
Chimo
Agree. Dealer seems pretty confident and have worked off the previous Yammy heights and come up about an inch (allowing for the 30 inch yammy leg and the plate I had made to raise the yammy up higher. Motor also sits a bit further back off the hull. Almost like a mini pod. Some chance of getting on the water Friday but more likely Saturday arvo or Monday.
Kev
Get the dealer to take you out when they do a test run, you wouldn't want to miss that! The Cannonvale mob must be selling a few G2s by now !
Not yet. They have done a 250 and have another 200 rigged on a demo. This is the first 300 but a few people are watching over my shoulder to see what numbers she posts, particularly fuel burn and oil consumption. We run a long way to the reef here and a big day can run to 150 plus miles out and back when we get serious. Stuck up a "before" and "during" for the dash/helm as well. After will be a day or 2
The Gen II Etec is one hell of a sexy looking motor, and has the power and economy to boot.. If I still had my seafarer, I would definitely be putting a Gen II on itOriginally Posted by kc
I have left the long suffering mechanic pretty much alone today...pretty much. It was all the boring stuff anyway like running the cables and wires and looms. he should be fitting the controls and new dash tomorrow so will get some more pics but I do have a few work commitments tomorrow (god forbid). Sea Trials, in all probability, will be Monday. Only job not done will be the new Minn Kota, which has actually taken longer than the motor to get here =(. Minn kota talk a good talk, but, really have not delivered. This may be a supply and demand issue and a bit like the etec , a sign that they are so good they can't make them quick enough. Would have been better to be honest up front, rather than overpromise and under-deliver. At least Etec advice was straight up front "8 to 10 weeks". The Minn Kota has been "soon" for over 2 months.
Apples to apples I am hoping for 30 MPH out of the etec at 1.36 lpm compared to 30 mph from the yammy at 2.33 lpm. If I get those sort of numbers I will be a very happy little fisho. I do 200 hours a year so looking at a fuel save of around $9000 a year if those are the numbers.
Hi KC,
At 2.33L per mile that is quite good fuel consumption for a heavy boat running at 26knots (unless I'm reading the figures wrong). I have the new 225 V6 yammi on a 6.5 meter plate boat and we use about 1.3Litres per Km which is not far off these figures thats running in a sea. If you look at the performance bullitens yamaha claim much better fuel economy, as the testing is done on a boat with 100 litres of fuel on the bay. It will be interesting to see if the figures are close to what they claim. I went from a tinny to my new boat and it took me about 6moths to come to terms with the fuel usage, now I don't even think about it as it is what it is. I'm looking forward to hearing the outcome!!!
Cheers Nick
Km/litre or Litres / km Nick ?
Apples to apples I can confirm the 250 Yammy was burning 1.46 litres per kilometre.and I am hoping to see about .85 of a litre per kilometer with the etec. A game changer. This is contingent on getting my speed at 4000 rpm with the etec compared to 5200 with the yammy.
I was thinking the same thing Scotty. If the units weren't mixed up that is pretty bad economy Nick...?? Well unless you always go out with 4 other blokes and 200kg of ice, then come home with another 200kg of fish
Cheers
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