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Author Topic:   Yamaha Four-cycle Has FORD Camshaft

outragesteve posted 09-01-2009 01:23 AM ET (US)
I'm rebuilding a F115 Yamaha (four stroke) and the cams have "Ford" logos stamped on them. Trying to figure out what Ford engine would use these cams...interesting
number9 posted 09-01-2009 03:13 AM ET (US)
1980s and 1990s Ford Taurus SHO had Yamaha built V-6 and V-8 engines.
Clark Roberts posted 09-01-2009 05:42 AM ET (US)
I believe that the Yamaha F115 has a Mercury block and Merc likely subed cams from Ford (maybe a MerCruiser connection).
Phil T posted 09-01-2009 06:42 AM ET (US)
The F115 is an inline 4 cylinder.
Steve - How many hours and why the rebuild?
jimh posted 09-01-2009 09:40 AM ET (US)
I do not believe that a Yamaha F115 has any Mercury parts. For a few years in the earliest days of four-cycle outboard development, Yamaha and Mercury collaborated for five years building a 40, 50, and 60-HP four-cycle outboard that has a engine block casting made by Mercury. The cylinder heads were made by Yamaha. This was around 1990 to 1995, I believe.
Yamaha has made some engines for use in Ford automobiles, but as noted they were not an in-line four cylinder.
It is quite odd that a Japanese manufacturer would allow a component in their product to have the name of a competitor. Is the Ford name in their blue oval logotype? Perhaps the "FORD" is just a part number with an unusual coincidence to the American automaker.
number9 posted 09-01-2009 01:46 PM ET (US)
Taurus SHO mentioned because 2x4=8 and Yamaha started coming out with the 75-115 4-stroke line about the same time Ford dropped the DOHC four valve per cylinder SHO. Quite possible that Yamaha took advantage of the excess manufacturing capacity and then defunct licensing agreements with Ford to produce the first DOHC inline four outboard.
L H G posted 09-01-2009 02:11 PM ET (US)
Jim - Mercury/Fond du Lac made the short blocks for Yamaha 4-stroke 50's from 1993 through 2003. That's a fact not subject to discussion. During that same period, Yamaha furnished the valve train to Mercury. The powerheads on those engines by both manufacturers were virtually identical. Mercury also furnished 25HP 4-stroke engines to Yamaha.
Nobody has yet figured out why Yamaha's current 40-50-60 have identical blocks to the same HP Mercs being manufactured today. I think Mercury is still making those blocks for Yamaha also, until somebody gives me a BETTER answer, and nobody seems to be able to do it.
With respect to this thread, maybe FORD manufactured those powerheads for Yamaha?
A2J15Sport posted 09-01-2009 05:35 PM ET (US)
The 90's era Ford Taurus SHO used cylinder heads made by Yamaha. The block was Ford. The were all 3.0L V-6.
I suspect that Yamaha did indeed have some tools and/or parts that contained the Ford logo to make the cams.
brisboats posted 09-01-2009 09:17 PM ET (US)
I will echo the question asked above, how many hours and why the rebuild?
In the past Mecury/Mercruiser made their own 3.7 liter aluminum block and topped it with a cast iron head from the 460 cubic inch Ford engine.
My own 2000 Mercury 50hp has an oil leak at the cam sprocket. Should I blame mercury, yamaha or ford?
Brian
outragesteve posted 09-01-2009 11:19 PM ET (US)
I, also thought of the Taurus/SHO connection. The Ford logo is very clear. Although it is not the "blue oval" it is the word "Ford" with the "F" scripped over the word. The engine has about 1500 hours, used commercially daily. (Not flushed!) Head gasket leaked and head needed welding/surfacing. The cam broke in half being installed. Perhaps it was damaged, somehow, by the water in the head. It runs great now!
seahorse posted 09-01-2009 11:33 PM ET (US)
If the cam broke while being installed, then someone was not reading the service manual and following procedure.
I think there was even a service bulletin or a tech article about how to install the overhead cams correctly otherwise they could break.
outragesteve posted 09-02-2009 03:21 PM ET (US)
Good news (for me) I was not the one installing the cam. The owner of the boat decided he "could do it" and this was the result. The new cam bolted up properly and the engine runs great.
A2J15Sport posted 09-02-2009 05:05 PM ET (US)
"Should I blame mercury, yamaha or ford? "
I think Ford. They are the current "Whipping Boy" as of late.
Glad you got it figured out. :-)

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Author	Topic: Yamaha Four-cycle Has FORD Camshaft
outragesteve	posted 09-01-2009 01:23 AM ET (US) I'm rebuilding a F115 Yamaha (four stroke) and the cams have "Ford" logos stamped on them. Trying to figure out what Ford engine would use these cams...interesting
number9	posted 09-01-2009 03:13 AM ET (US) 1980s and 1990s Ford Taurus SHO had Yamaha built V-6 and V-8 engines.
Clark Roberts	posted 09-01-2009 05:42 AM ET (US) I believe that the Yamaha F115 has a Mercury block and Merc likely subed cams from Ford (maybe a MerCruiser connection).
Phil T	posted 09-01-2009 06:42 AM ET (US) The F115 is an inline 4 cylinder. Steve - How many hours and why the rebuild?
jimh	posted 09-01-2009 09:40 AM ET (US) I do not believe that a Yamaha F115 has any Mercury parts. For a few years in the earliest days of four-cycle outboard development, Yamaha and Mercury collaborated for five years building a 40, 50, and 60-HP four-cycle outboard that has a engine block casting made by Mercury. The cylinder heads were made by Yamaha. This was around 1990 to 1995, I believe. Yamaha has made some engines for use in Ford automobiles, but as noted they were not an in-line four cylinder. It is quite odd that a Japanese manufacturer would allow a component in their product to have the name of a competitor. Is the Ford name in their blue oval logotype? Perhaps the "FORD" is just a part number with an unusual coincidence to the American automaker.
number9	posted 09-01-2009 01:46 PM ET (US) Taurus SHO mentioned because 2x4=8 and Yamaha started coming out with the 75-115 4-stroke line about the same time Ford dropped the DOHC four valve per cylinder SHO. Quite possible that Yamaha took advantage of the excess manufacturing capacity and then defunct licensing agreements with Ford to produce the first DOHC inline four outboard.
L H G	posted 09-01-2009 02:11 PM ET (US) Jim - Mercury/Fond du Lac made the short blocks for Yamaha 4-stroke 50's from 1993 through 2003. That's a fact not subject to discussion. During that same period, Yamaha furnished the valve train to Mercury. The powerheads on those engines by both manufacturers were virtually identical. Mercury also furnished 25HP 4-stroke engines to Yamaha. Nobody has yet figured out why Yamaha's current 40-50-60 have identical blocks to the same HP Mercs being manufactured today. I think Mercury is still making those blocks for Yamaha also, until somebody gives me a BETTER answer, and nobody seems to be able to do it. With respect to this thread, maybe FORD manufactured those powerheads for Yamaha?
A2J15Sport	posted 09-01-2009 05:35 PM ET (US) The 90's era Ford Taurus SHO used cylinder heads made by Yamaha. The block was Ford. The were all 3.0L V-6. I suspect that Yamaha did indeed have some tools and/or parts that contained the Ford logo to make the cams.
brisboats	posted 09-01-2009 09:17 PM ET (US) I will echo the question asked above, how many hours and why the rebuild? In the past Mecury/Mercruiser made their own 3.7 liter aluminum block and topped it with a cast iron head from the 460 cubic inch Ford engine. My own 2000 Mercury 50hp has an oil leak at the cam sprocket. Should I blame mercury, yamaha or ford? Brian
outragesteve	posted 09-01-2009 11:19 PM ET (US) I, also thought of the Taurus/SHO connection. The Ford logo is very clear. Although it is not the "blue oval" it is the word "Ford" with the "F" scripped over the word. The engine has about 1500 hours, used commercially daily. (Not flushed!) Head gasket leaked and head needed welding/surfacing. The cam broke in half being installed. Perhaps it was damaged, somehow, by the water in the head. It runs great now!
seahorse	posted 09-01-2009 11:33 PM ET (US) If the cam broke while being installed, then someone was not reading the service manual and following procedure. I think there was even a service bulletin or a tech article about how to install the overhead cams correctly otherwise they could break.
outragesteve	posted 09-02-2009 03:21 PM ET (US) Good news (for me) I was not the one installing the cam. The owner of the boat decided he "could do it" and this was the result. The new cam bolted up properly and the engine runs great.
A2J15Sport	posted 09-02-2009 05:05 PM ET (US) "Should I blame mercury, yamaha or ford? " I think Ford. They are the current "Whipping Boy" as of late. Glad you got it figured out. :-)