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Author Topic:   who makes which motor?
5 mi E of Milwaukee posted 04-02-2003 01:42 PM ET (US)   Profile for 5 mi E of Milwaukee   Send Email to 5 mi E of Milwaukee  
I’m not a gear-head. As long as a motor starts when I turn the key, and doesn’t quit until I remove it, I never worried overmuch about the decal on the cowling. However, lurking my way through threads on this forum, the notion is sinking in that many motors are IDENTICAL except for the decals. I’m considering repowering my Montauk with a four stroke in the near, if not immediate, future, and feel that if I knew which motors were twins that perhaps I’d be able to get by with digesting fewer catalogs and, just perhaps, keep my head from exploding while still making an informed choice.

Is there a motor mavin out there who has a list of known four stroke engine “twins?”

(Extra credit for including two strokes; and if the list is historical as well (e.g. Who built the “Ted Williams” labeled motors for Sears?) I bet you could be the next proud author of a Reference article for this site.)

Thanks much -- scott

PFSQUAN posted 04-02-2003 02:25 PM ET (US)     Profile for PFSQUAN  Send Email to PFSQUAN     
Re Ted Williams motors: were they made by Eska or Gale (which was an OMC co?)
Bigshot posted 04-02-2003 02:28 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I'm going with current 2002 and newer engines here.

4 stroke Johnsons are made by suzuki. Identical except for paint and wiring harness. if you have an OMC now the johnson will make more sense because controls, wiring harness and guages are compatible.

Most Mercury and Yamaha 4 strokes share the same powerheads and lower units and that is about all they have in common. Smaller Mercs(<6hp) are made by Tohatsu. All Nissans are Tohatsu.

Honda is Honda.

dgp posted 04-02-2003 03:54 PM ET (US)     Profile for dgp  Send Email to dgp     
Beginning in model year 2001, Mercury 30-60hp four strokes are all Mercury designed and built, not Yamaha powerheads.
lhg posted 04-02-2003 06:06 PM ET (US)     Profile for lhg    
And Yamaha's 30, 40 & 60 HP 4 strokes use Mercury's powerheads, but don't have the EFI system.

The Yamaha/Mercury 75-115 4 strokes are a joint venture, basically the same engines, and both powerheads are made by each, although I believe the design is by Yamaha. My Mercury dealer, who also sells Yamaha, tells me that he has seen some funny engines come in, such as a Yamaha 100 (now called a 90) with a black painted powerhead, meaning it was built by Mercury.
He has also seen some Mercs with the Yamaha grey powerheads! The Yamaha 75 & 90's weigh less than the Mercury versions, but in 115 HP, the Mercurys weigh less, since they have a smaller, non-CR gearcase.

Also don't count out Mercury's new 75-115Hp Optimax 2 strokes, or the Evinrude Fichts in 75 or 90HP. It appears as though the lackluster performance and high weight of the mid-range 4-strokes has propted revised thinking in mid range DFI, for faster performance. OMC may have been on the right track after all.

captbone posted 04-02-2003 07:36 PM ET (US)     Profile for captbone  Send Email to captbone     
My stroke 2002 40 hp 4 stroke is the same block as the yamaha 40, the merc just has the EFI. Merc and Yamaha have been partners on several motors and still are on many.

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