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Author Topic:   HP rating vs. cubes

kysard posted 07-28-2002 04:04 PM ET (US)
Don't want to start a Merc vs Yamy thread but I'm comparing the 90 2 strokes. I get $500 off on Mercs thru work and have always bought them. I moved to an area with a shallow rocky river so I have been looking at engine weights closely. Looks like there is a 44 lb savings with the Yamy.
1. With the lower cubes is this as powerful as the merc?
2. With controls and rebate the Yamy would be about $1500 more, is the weight savings worth it?
Dick posted 07-28-2002 07:20 PM ET (US)
It would be interesting to see a power head HP rating for both. I suspect that Yamy is getting the HP boost via their gear ratio.
Prop shaft HP is going to be close between them but with the Merc having allmost 22% more cubes I would think the torque curve would be better.
44 pounds isn't much, and I think that most of that weight is in Merc's stout gear case.
Bigshot posted 07-29-2002 09:52 AM ET (US)
In a Whaler that 44lbs is not noticable. My 70 weighs 340+ and I have a jack plate and I only sit 1/2-3/4 of an inch lower than my Yamaha did. The Yammie is not as powerful, more like a 75 than a 90.

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Author	Topic: HP rating vs. cubes
kysard	posted 07-28-2002 04:04 PM ET (US) Don't want to start a Merc vs Yamy thread but I'm comparing the 90 2 strokes. I get $500 off on Mercs thru work and have always bought them. I moved to an area with a shallow rocky river so I have been looking at engine weights closely. Looks like there is a 44 lb savings with the Yamy. 1. With the lower cubes is this as powerful as the merc? 2. With controls and rebate the Yamy would be about $1500 more, is the weight savings worth it?
Dick	posted 07-28-2002 07:20 PM ET (US) It would be interesting to see a power head HP rating for both. I suspect that Yamy is getting the HP boost via their gear ratio. Prop shaft HP is going to be close between them but with the Merc having allmost 22% more cubes I would think the torque curve would be better. 44 pounds isn't much, and I think that most of that weight is in Merc's stout gear case.
Bigshot	posted 07-29-2002 09:52 AM ET (US) In a Whaler that 44lbs is not noticable. My 70 weighs 340+ and I have a jack plate and I only sit 1/2-3/4 of an inch lower than my Yamaha did. The Yammie is not as powerful, more like a 75 than a 90.