300hp Outboard Current Market Costs - .....

[mustang5]

I'm currently contemplating the same options for my boat. My set up is twin 115 suzukis pushing a 2.5t (dry) hull. They do the job ok but when I'm fully loaded it struggles thru the troughs. I had my heart set on a yam 300 but after speaking with yatala yamaha they tried swaying me towards the 250. At first I thought it might be an attempt to impulse me into a quicker sale with a saving of 5k, but after much research and looking at a lot of performance reports it really does look like the better option. The new 4.2's are exactly the same block, the 250 actually puts out about 265hp vs the 300's 285 or thereabouts. And only when you use premium fuel will you squeeze the extra hp out of the 300, which for me is never.. The performance reports using the exact same hull (Grady White 235 from memory) were almost identical except for the last 1000rpm where it squeezed out another whopping 2mph. Mid range cruise, trolling etc all pretty much exact same with same mpg as well. Anyway at a saving of around 5k I think my mind is made up. As much as the macho man in me would love that "300" sitting on the transom! Bit of food for thought..

Yeah Yatala said the same thing to me, however instead of the 250 was pushing me away to the 350hp.

I'm still searching for real life performance reviews or accounts for both the zuk and yam 300.

Also, I don't know if the removal of the cast steel internals is proven as of yet with the yamaha. Sure there's weight savings, but just not sure .

I might have to put the twins in the dreams of a better life list as I believe they will take me over 3.5t.

Anyone have any real life comparison data between the new Suzuki and the new yam??

[Luke G]

Ive got a 300 yammy my boat, 2380wac sailfish, my boats probably around the same weight as yours but a deeper v,

I have only done about 20hours so far and just put on a new 4 blade prop and get about 38-39 knots out of it, cruises on 25knots at 4400rpm using about 1lt / km

I like both yammys and suzukis and personally dont think you can go wrong with either!

My 300 has plenty of go to get up on the plane and the fly by wire stuff is so easy to use.

Cheers
Luke

[myusernam]

what about the 350 yamaha? whoops reread posts above. already mentioned

[chocolatemoose]

lol i got my 7 marine hat in the mail a little while ago. love the progress those guys have had. not to sure we will see any in australia any time soon. 70kUS though thats not to bad for the HP and unique factor

[gofishin]

...The new 4.2's are exactly the same block, the 250 actually puts out about 265hp vs the 300's 285 or thereabouts. And only when you use premium fuel will you squeeze the extra hp out of the 300, which for me is never... The performance reports using the exact same hull (Grady White 235 from memory) were almost identical except for the last 1000rpm where it squeezed out another whopping 2mph. Mid range cruise, trolling etc all pretty much exact same with same mpg as well. Anyway at a saving of around 5k I think my mind is made up. As much as the macho man in me would love that "300" sitting on the transom! Bit of food for thought..

Simon is pretty much on the money here, except that I think the V6 300 should ONLY be run on Premium (Jim can confirm if this is correct or not). The actual tested power outputs for the Yams by the US EPA are 288 vs 264 Hp for the 300 vs 250 respectively (refer attached). Note that the 300 produces max torque at 5000 rpm, 500rpm above that for the 250hp. Your current 3.3L 225 provides 221hp (also from EPA data).

At WOT a simple calculation tells us that the extra 24 hp will give us a theoretical "SQRT(288/264) = 1.044" = a 4.4% increase in top end speed, all things being equal (i.e. prop efficiency, boat/engine setup, conditions etc). What we can't compare is how they perform at the important mid-range, as torque curves are a big secret in this industry. However Simon's comparison above is obviously a good guide.

At WOT the 300 will burn ~100L/h while the 250 will burn ~90 L/h.

I do like the new 300 V6, and I have done plenty of hours in a mates 685 with one - and it is indeed a sweet donk, however if I were choosing a donk for the 685 I would go the 250 every time as (IMHO) the additional 24hp is not worth it in this case.

Your case is a different kettle of fish again, as the 2601 is a fair lump of a boat. Knowing about your required/normal loading (from your previous threads) I would definitely be looking at all options, '250' and '300' and '300+' classes, all colours, (and I am a Yamaha man ), including the 350 V8. Check out THT, thousands more 2601's over there than here, and I am sure there are relevant threads to check out re power options. Good luck.
Cheers
Brendon

Edit:
PS. Ad yes, don't discount twins. Two donks for 'X' Hp on any heavy boat, where 'X' Hp might be a bit marginal in a single, will still give great very good mid-range performance where as a single of 'X' Hp will bog down and be a dog etc when conditions are cr@p and you are heavily loaded.

[Greg P]

what about the 350 yamaha? whoops reread posts above. already mentioned

Those Yammie Gen 1 V8 350s seem to have some major issues with flywheel mounting, be interesting to see how the 7Marine go in the long run - they sure sound sweet.

[bannana]

Simon is pretty much on the money here, except that I think the V6 300 should ONLY be run on Premium (Jim can confirm if this is correct or not). The actual tested power outputs for the Yams by the US EPA are 288 vs 264 Hp for the 300 vs 250 respectively (refer attached). Note that the 300 produces max torque at 5000 rpm, 500rpm above that for the 250hp. Your current 3.3L 225 provides 221hp (also from EPA data).

At WOT a simple calculation tells us that the extra 24 hp will give us a theoretical "SQRT(288/264) = 1.044" = a 4.4% increase in top end speed, all things being equal (i.e. prop efficiency, boat/engine setup, conditions etc). What we can't compare is how they perform at the important mid-range, as torque curves are a big secret in this industry. However Simon's comparison above is obviously a good guide.

At WOT the 300 will burn ~100L/h while the 250 will burn ~90 L/h.

I do like the new 300 V6, and I have done plenty of hours in a mates 685 with one - and it is indeed a sweet donk, however if I were choosing a donk for the 685 I would go the 250 every time as (IMHO) the additional 24hp is not worth it in this case.

Your case is a different kettle of fish again, as the 2601 is a fair lump of a boat. Knowing about your required/normal loading (from your previous threads) I would definitely be looking at all options, '250' and '300' and '300+' classes, all colours, (and I am a Yamaha man ), including the 350 V8. Check out THT, thousands more 2601's over there than here, and I am sure there are relevant threads to check out re power options. Good luck.
Cheers
Brendon

I know a guy that has the same 3100 Noosacat as I and powered with twin 250 yammies where mine has 300 yammies. Glen Gibson from Yamaha begged me multiple times not to go 300's that it was a waste of $$, worst economy, only benefit is if you use premium unleaded and stick with the 250's but I thought it was a heavy boat and needed the 300's.

I was wrong!!!! The 250's on the other 3100 is incredibly more economical (up to .4 of a litre a k), performance not noticeably different and top end speed similar.

Basically if a 250 yammies not enough then go straight to the 350 because the 300's are bugger all different, more expensive to purchase and far more expensive to run.

[mustang5]

Ok thanks fellas.

So I was set on the Yammy but now possibly having second thoughts.

My problem is that a 250hp is simply not enough. I understand the yammy 250 is more than a 250 however I still dont think it will cut it. Sure I may sound like I want the bigger number on the back but I need at least a cruise speed of 29knts as these boats only perform well when they are well out of the water..

I notice the 300hp Suzuki has more HP than the Yamaha, at a lower rpm. Where the Yamaha has more torque... I suppose on a heavy boat, what is more important?

My other factors at present is the local servicing.. Have a suzi dealer local, however nowhere for the yammy.

I know twins would be ideal, however it will throw me over the weight limit (3.5t) for towing, and is probably 10k over my budget. Those demo 175's are sold.

[myusernam]

twin 150's would be cheaper and still ok

[ric]

Ok thanks fellas.

So I was set on the Yammy but now possibly having second thoughts.

My problem is that a 250hp is simply not enough. I understand the yammy 250 is more than a 250 however I still dont think it will cut it. Sure I may sound like I want the bigger number on the back but I need at least a cruise speed of 29knts as these boats only perform well when they are well out of the water..

I notice the 300hp Suzuki has more HP than the Yamaha, at a lower rpm. Where the Yamaha has more torque... I suppose on a heavy boat, what is more important?

My other factors at present is the local servicing.. Have a suzi dealer local, however nowhere for the yammy.

I know twins would be ideal, however it will throw me over the weight limit (3.5t) for towing, and is probably 10k over my budget. Those demo 175's are sold.

Whats the total amount of weight for engines which will keep you under the magical 3.5?

[mustang5]

Whats the total amount of weight for engines which will keep you under the magical 3.5?

Weighed the boat with half fuel and the 225 which was 273kg and it came in at 3412kg.

Half fuel which was 300L weighs 212kg.

So If I was fully fueled I would be 3624kg with a single outboard..

If I was empty I would have 570kg to play with

If I work on half fuel, I have 358kg to play with (My most likely setup when going fishing.)

[myusernam]

whoops wrong thread. im having a shocker

[ric]

That rules out a pair of 150's which sound like what you need.

Even the new mercury 150 is over 400kg for a pair(thats what i just bought)

[06Adsy]

Twin 140 zooks would have you close to your half fuel 358kg.

[cormorant]

Check if those motor weights include prop and oil for XL length when that close to weights.

Does the trailer tow weight take into account the 100kg plus on the towball?

In regards to the 140s ( wouldn't want them lugging) I would strip 50kg off the trailer ( walkway, spare tyre to the tow vehicle) or out of the boat and have the 175 ( same weight as the 150hp 200kg ) everyday and carry 2 jerrys of fuel in the tow vehicle or fill up at the marina on the way out for extra fuel and water. Gotta be some crap in tyeh boat you never use and don't need? 3rd anchor and chain?

Time to set up a spreadsheet with real rigged weights and real HP output on normal aussie fuel so you can compare apples with apples. Shame a lot of dealers won't have the truth and torque graph ready to go for you.

At least you have the brains to keep it legal so if the worst happens you will have insurance cover and no liability. Plenty of others just tow and hope for the best

PS Give solas a call. To correctly prop stuff they must have a very good idea of the torque curve of most motors ( or have dyno results from OS) to make selecting prop blade and cupping easier.