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Author Topic:   New EFI Yamaha 40 HP 4-Stroke

frontier posted 10-02-2008 02:26 PM ET (US)
Just got the new Yamaha outboard brochure.
Brand new EFI 40 4-Stroke. Looks interesting.
My 1st thoughts were it looked like the 1960's low profile Evinrude 9.9, where the powerhead is in the midsection.
May be a great choice for a Whaler classic 13 repower.
No weight is listed in brochure or on website. Even a call to Yamaha didn't help.
WT posted 10-02-2008 02:48 PM ET (US)
I'm guessing by looking at the weight ratios of the 90 to 60 Yamaha outboards, the weight of the 40 should be around 180 pounds.
Warren
Tom W Clark posted 10-02-2008 03:15 PM ET (US)
Looks heavy. I predict a weight of about 220 pounds.
jimh posted 10-02-2008 03:31 PM ET (US)
I cannot see your brochure. How about a link to someplace I can see the new Yamaha 40-HP four-cycle outboard?
erik selis posted 10-02-2008 04:02 PM ET (US)
My buddy Frank just bought the 2008 model 40 HP Yamaha 4-stroke for the 13-Sport I'm working on. It's not the EFI version but the carb version. The dealer said the new EFI would weigh slightly more than the old model which weighs 96kg (211 lbs including tilt/trim and electric start) I think Tom's prediction is about right.
Erik
sraab928 posted 10-02-2008 07:27 PM ET (US)
Jim,
I found this on Yamaha's website - you can click on the F40 Hot sheet and it loads a 8 page PDF which also indicates a 219 pound estimated dry weight. (Good guess Tom!)
http://www.yamaha-motor.com/outboard/whats_new.aspx
WT posted 10-02-2008 08:23 PM ET (US)
Oooops.
I had figured:
F90 is 369 pounds divided by 97 cubic inch is 3.8 pounds/CI.
F60 is 237 pounds divided by 60.8 cubic inches is 3.9 pounds/CI.
So the F40 being 45.6 cubic inches times approximated 3.9 pounds/CI equals 177.84 pounds.
http://www.yamaha-motor.com/outboard/products/subcatspecs/2/specs.aspx
Warren
frontier posted 10-02-2008 08:40 PM ET (US)
219#? Too heavy.
I appreciate the EFI and improvements, but aren't 4-Strokes supposed to be getting better AND lighter?
They've done it with the smaller sizes.
Looks like the old 158# 40 HP 2-Stroke Yamaha is still the best choice for a 13 re-power (if you can find one).
swist posted 10-02-2008 09:31 PM ET (US)
The 4-strokes may be getting better, but is there really evidence that they are getting lighter?
Moe posted 10-02-2008 09:31 PM ET (US)
Very interesting--same bore, stroke, and displacement, same 2.0:1 gearing, and same alternator output as the 3-cylinder Mercury non-BigFoot 40. Only difference I see in the specs (besides the Merc weighing 216 pounds) is the Merc max operating rpm is 5500-6000 while the Yamaha is 5000-6000.
jimh posted 10-02-2008 09:41 PM ET (US)
I guess this is Yamaha's next-generation motor in the 40-HP range. Previously for many years Mercury and Yamaha were joined at the hip in this power range with a 40-HP four-cycle motor that was the result of a joint development project. Mercury and Yamaha had a nasty break-up a few years ago.
Mercury now has their own 40-HP motor--I don't really know if that motor is made with Tohatsu or not, and that might be a good topic to explore. This new Yamaha motor seems to be Yamaha's own design, made by Yamaha, and sold only by Yamaha.
I did see an image of the catalogue picture, and my first reaction was, "Wow, that is a big motor for a 40-HP."
Peter posted 10-03-2008 07:50 AM ET (US)
220 lbs is too heavy for a classic 13 transom.
The acid test for me on outboard motors of this size is whether they can be pull started when connected to a dead battery. The specification sheet doesn't indicate whether it is capable of being started with a dead battery and because they don't emphasize that as a feature, I bet it doesn't have the capability. The only 4-strokes that I am aware of that have this capability are Mercury 25 and 30 HP FourStrokes.
erik selis posted 10-03-2008 07:57 AM ET (US)
I found the video clip.
http://www.boattest.com/engines/Engine-Test.aspx?ID=208
Erik
jimh posted 10-03-2008 08:40 AM ET (US)
It is odd that this Yamaha motor and the Mercury motor have the exact same displacement, 747 cc. It makes you wonder if there is more commonality between them.
L H G posted 10-03-2008 06:32 PM ET (US)
Jim - the Merc 40,50,60EFI 4-strokes are all Mmerc, first made in Fond du Lac for 2003 model year, then production moved to China for 2007 model year I think. Tohatsu has nothing to do with these engines.
Since 1994 Mercury/Fond du Lac has manufactured the powerheads for the Yamaha F-40, F-50 and F-60. Probably one of the reasons why the China plant made sense. From there they ship them up to Japan to be dressed out by Yamaha with heads, fuel system etc. That's why the cubes are the same. Yamaha didn't crib the Merc design. They just buy it, but in true Japanese style, will never admit it. The identical displacements are not a coincidence. Seems like a great deal for both companies, since between them they just about CONTROL this HP range. They are great highly reliable engines, and have been for 15 years now.
Mumbo Jumbo posted 10-03-2008 08:28 PM ET (US)
Way too heavy. End of story, in my opinion.
fishgutz posted 10-04-2008 10:58 AM ET (US)
If you want a light weight low emissions motor in 40 horses, your choices are pretty thin. They are all round 220 pounds. Tohatsu and Honda are 205.
20dauntless posted 10-04-2008 06:03 PM ET (US)
Honda has a new 40's and 50's out with EFI. They weigh in at 214 pounds dry.
Mumbo Jumbo posted 10-04-2008 07:51 PM ET (US)
The new 30hp ETEC with power trim and tilt, at 177 pounds (I think this is correct), would seem be a good match for the 13 Whaler classic. Obviously, those who pull skiers or water boards would want more power, but for others it should have appeal.

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Author	Topic: New EFI Yamaha 40 HP 4-Stroke
frontier	posted 10-02-2008 02:26 PM ET (US) Just got the new Yamaha outboard brochure. Brand new EFI 40 4-Stroke. Looks interesting. My 1st thoughts were it looked like the 1960's low profile Evinrude 9.9, where the powerhead is in the midsection. May be a great choice for a Whaler classic 13 repower. No weight is listed in brochure or on website. Even a call to Yamaha didn't help.
WT	posted 10-02-2008 02:48 PM ET (US) I'm guessing by looking at the weight ratios of the 90 to 60 Yamaha outboards, the weight of the 40 should be around 180 pounds. Warren
Tom W Clark	posted 10-02-2008 03:15 PM ET (US) Looks heavy. I predict a weight of about 220 pounds.
jimh	posted 10-02-2008 03:31 PM ET (US) I cannot see your brochure. How about a link to someplace I can see the new Yamaha 40-HP four-cycle outboard?
erik selis	posted 10-02-2008 04:02 PM ET (US) My buddy Frank just bought the 2008 model 40 HP Yamaha 4-stroke for the 13-Sport I'm working on. It's not the EFI version but the carb version. The dealer said the new EFI would weigh slightly more than the old model which weighs 96kg (211 lbs including tilt/trim and electric start) I think Tom's prediction is about right. Erik
sraab928	posted 10-02-2008 07:27 PM ET (US) Jim, I found this on Yamaha's website - you can click on the F40 Hot sheet and it loads a 8 page PDF which also indicates a 219 pound estimated dry weight. (Good guess Tom!) http://www.yamaha-motor.com/outboard/whats_new.aspx
WT	posted 10-02-2008 08:23 PM ET (US) Oooops. I had figured: F90 is 369 pounds divided by 97 cubic inch is 3.8 pounds/CI. F60 is 237 pounds divided by 60.8 cubic inches is 3.9 pounds/CI. So the F40 being 45.6 cubic inches times approximated 3.9 pounds/CI equals 177.84 pounds. http://www.yamaha-motor.com/outboard/products/subcatspecs/2/specs.aspx Warren
frontier	posted 10-02-2008 08:40 PM ET (US) 219#? Too heavy. I appreciate the EFI and improvements, but aren't 4-Strokes supposed to be getting better AND lighter? They've done it with the smaller sizes. Looks like the old 158# 40 HP 2-Stroke Yamaha is still the best choice for a 13 re-power (if you can find one).
swist	posted 10-02-2008 09:31 PM ET (US) The 4-strokes may be getting better, but is there really evidence that they are getting lighter?
Moe	posted 10-02-2008 09:31 PM ET (US) Very interesting--same bore, stroke, and displacement, same 2.0:1 gearing, and same alternator output as the 3-cylinder Mercury non-BigFoot 40. Only difference I see in the specs (besides the Merc weighing 216 pounds) is the Merc max operating rpm is 5500-6000 while the Yamaha is 5000-6000.
jimh	posted 10-02-2008 09:41 PM ET (US) I guess this is Yamaha's next-generation motor in the 40-HP range. Previously for many years Mercury and Yamaha were joined at the hip in this power range with a 40-HP four-cycle motor that was the result of a joint development project. Mercury and Yamaha had a nasty break-up a few years ago. Mercury now has their own 40-HP motor--I don't really know if that motor is made with Tohatsu or not, and that might be a good topic to explore. This new Yamaha motor seems to be Yamaha's own design, made by Yamaha, and sold only by Yamaha. I did see an image of the catalogue picture, and my first reaction was, "Wow, that is a big motor for a 40-HP."
Peter	posted 10-03-2008 07:50 AM ET (US) 220 lbs is too heavy for a classic 13 transom. The acid test for me on outboard motors of this size is whether they can be pull started when connected to a dead battery. The specification sheet doesn't indicate whether it is capable of being started with a dead battery and because they don't emphasize that as a feature, I bet it doesn't have the capability. The only 4-strokes that I am aware of that have this capability are Mercury 25 and 30 HP FourStrokes.
erik selis	posted 10-03-2008 07:57 AM ET (US) I found the video clip. http://www.boattest.com/engines/Engine-Test.aspx?ID=208 Erik
jimh	posted 10-03-2008 08:40 AM ET (US) It is odd that this Yamaha motor and the Mercury motor have the exact same displacement, 747 cc. It makes you wonder if there is more commonality between them.
L H G	posted 10-03-2008 06:32 PM ET (US) Jim - the Merc 40,50,60EFI 4-strokes are all Mmerc, first made in Fond du Lac for 2003 model year, then production moved to China for 2007 model year I think. Tohatsu has nothing to do with these engines. Since 1994 Mercury/Fond du Lac has manufactured the powerheads for the Yamaha F-40, F-50 and F-60. Probably one of the reasons why the China plant made sense. From there they ship them up to Japan to be dressed out by Yamaha with heads, fuel system etc. That's why the cubes are the same. Yamaha didn't crib the Merc design. They just buy it, but in true Japanese style, will never admit it. The identical displacements are not a coincidence. Seems like a great deal for both companies, since between them they just about CONTROL this HP range. They are great highly reliable engines, and have been for 15 years now.
Mumbo Jumbo	posted 10-03-2008 08:28 PM ET (US) Way too heavy. End of story, in my opinion.
fishgutz	posted 10-04-2008 10:58 AM ET (US) If you want a light weight low emissions motor in 40 horses, your choices are pretty thin. They are all round 220 pounds. Tohatsu and Honda are 205.
20dauntless	posted 10-04-2008 06:03 PM ET (US) Honda has a new 40's and 50's out with EFI. They weigh in at 214 pounds dry.
Mumbo Jumbo	posted 10-04-2008 07:51 PM ET (US) The new 30hp ETEC with power trim and tilt, at 177 pounds (I think this is correct), would seem be a good match for the 13 Whaler classic. Obviously, those who pull skiers or water boards would want more power, but for others it should have appeal.