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Old 27 August 2003, 13:41   #1
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Country: UK - England
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30 to 50hp upgrade

Want to upgrade my Honda 30 to a new 50hp on my 4.0m Avon Searider but confused which to choose. 50p is max capacity for boat and max transom weight is 110kgs. Am looking at Honda(92kg), Suzuki 4 Stroke EFi(110kgs), the new Evinrude Etec(108kg) and Yamaha 2 Stroke(103kgs). All are 50hp and with power trim/tilt which I want.
Like light weight and 5yr guarantee of Honda, but happy to consider alternatives. Proximity of dealer not a problem, all are nearby for these brands. Yamaha is certainly the cheapest.
-Does slight extra weight of other engines affect performance?
-Is noise and smoothness an issue if I choose 2-stroke or doesn't it matter at this size of engine?
-Have heard issues of chine walking if stern too heavy. would this be a problem with the heavier engines?
Would appreciate your thoughts. Thanks.
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Old 27 August 2003, 14:22   #2
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Boat name: Won't get Fooled Again
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I personally think it's an outrage to put a wussy 4 stroke engine on an Avon Sea Rider. The best engine for your boat is the Yamaha 2 stroke in my opinion. The build construction of the Yammie is also hard to beat.

I am not sure about this but I think Honda measures its Power output at the Crankshaft, but the others do it at the Prop. If that is the case then work out the power to weight ratio and you may find the Honda isn't the best.

Cant speak about the other two engines as I have no experience.

Cheers
Stuart
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Old 27 August 2003, 14:42   #3
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Hi There,
Would recommend the Yamaha 50hp 2 stroke. It comes with a tach and power/tilt digital indicator and various warning gizmos.
I have had no problems and the cold start ignition is a dream.Power output is quick and responsive and fuel consumption is very good for a two stroke.
Regards
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Old 27 August 2003, 15:08   #4
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Right that's settled it then buy the Yammie
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Old 27 August 2003, 15:10   #5
DM
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Quote:
Originally posted by THEWAVEHUMPER
I personally think it's an outrage to put a wussy 4 stroke engine on an Avon Sea Rider.
Yes Humper. Outrageous!!!! How dare he even consider it. Yellow card and a visit to the Yammie shop for P.D. p.d.q.


D.M.
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Old 27 August 2003, 17:55   #6
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I take it you recommend the Yamaha then boys? Never realised there was quite such feeling against 4-strokes!! Thanks a lot for your comments, you've virtually convinced me in favour of 2-stroke, though I imagine trade-in value will plummet after 2006 legislation(?)
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Old 27 August 2003, 18:58   #7
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We have Ribtec 455 with a Yammy 50hp 4 stroke and it goes like a rocket, you can't hear it, and you don't have to fill it up with oil.

I reckon you are bonkers to get a 2 stroke in this kind of hp.
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Old 27 August 2003, 22:03   #8
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I know they're rarely thought of, but have you considered the Tohatsu 50 TLDI engine? - it's still a 2-stroke, but with some technology inside...
http://www.tohatsu.com/outboards/50tldi.html

You should also find that the price is pretty competitive too.

I still like my ultra quiet 4-stroke

-Alex
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Old 28 August 2003, 01:22   #9
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Quote:
Originally posted by H2O Events
We have Ribtec 455 with a Yammy 50hp 4 stroke and it goes like a rocket, you can't hear it, and you don't have to fill it up with oil.

I reckon you are bonkers to get a 2 stroke in this kind of hp.
Hi Stuart,

That's a good one a Ribtec 4.5 owner telling other people they are Bonkers!

For the record I am not against 4 strokes I just think Opti's and Yammi 2 strokes represent excellent value and unbeatable power

Like yourself I own several boats which include 2stroke, 4 stroke and diesel engines. From a 15 hp Honda to a 425hp CAT. Of all the boats I have driven the one that makes me feel most alive and at one with the sea is the Avon SR 4.7.

Sea Riders are not smooth boats and by design they run very light when planing. When I am driving mine I realy like the snap of the 2 stroke and the usable power band is at times close to frightening. mm Yummie.?

I gotta go.... Its a very sad day for me today as I am selling my Avon this morning and I miss it already. M

Cheers Stuart
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Old 28 August 2003, 10:18   #10
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Now I really am confused! The one thing that's immediately obvious to me in all this is that people are firm advocates of either 2 or 4-stroke. Thanks Alex for your Tohatsu recommendation. I rang the dealer this morning and the TLDi (92kgs) is 2,250 to change,which is quite expensive compared to Tohatsu standard 50 2-stroke which is only 950 to change and weighs just 75kgs, the lightest in this class by a mile. The Yamaha is 1,900 to change and the Honda about 2,500. One I hadn't considered until now is the Mariner/Mercury option, which is about 1,300 to change. Tohatsu and Mercury win on price then, Yamaha apparently on quality of engineering. Problem is compounded by fact that I shall undoubtedly upgrade entire boat/engine in 2-3 years anyway so not too concerned about long term reliability. I also happen to think the black Merc's look really neat! Why does it have to be this complicated?!
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