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Old 31 December 2011, 11:36   #1
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Avon Searider 4.0 Repower

Hi everyone...I just found this site & it looks great!!

I have had a 1986 Avon Searider 4.0 for a few years with an origional 40 horse Johnson. I love this boat...use it as a tender for my workboats, take it on all sorts of island camping adventures, use it to make in-water service calls on customer boats, etc

The time has come for a repower and I'm looking for suggestions...speciflcally people with experience running four stroke motors on this boat. A yamaha 2 stroke 50 (no longer produced) weighs 189 pounds while a Yamaha F50 weighs 237 pounds and an etec 50 is about 240. My transom is still pretty good, so let's take that out of the equation for now

What are your thoughts about adding 40-50lbs for a 4stroke? I am still leaning toward finding a used two stroke yamaha 50, but I have a couple F50's on a work barge and they have proven absolutely bulletproof after three thousand hours.

Thanks for reading!!
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Old 31 December 2011, 16:34   #2
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What are your thoughts about adding 40-50lbs for a 4stroke?
Thanks for reading!!
Welcome to the forum.
Regards the above, what are your thoughts on sinking?
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Old 31 December 2011, 17:25   #3
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I recall reading an article by Hugo Montswannery-whatsisname or his magazine anyway, a couple of years ago, where they tested an SR4 with a Yam F50 and found it stern-heavy. May be worth digging that out for a read.

I've driven Mollers's SR4 with a Honda BF50 (which is a touch lighter than the Yam) and that was fine, with no dnager of any swamping over the stern, although the flooding hull had sensibly been sealed off.
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Old 31 December 2011, 18:19   #4
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Welcome to the forum.
Regards the above, what are your thoughts on sinking?
What are your thoughts on wasting my time with a useless answer? The transom weight rating is 110KG. I am quickly reminded why I never bother with these forums.
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Old 31 December 2011, 18:25   #5
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I recall reading an article by Hugo Montswannery-whatsisname or his magazine anyway, a couple of years ago, where they tested an SR4 with a Yam F50 and found it stern-heavy. May be worth digging that out for a read.

I've driven Mollers's SR4 with a Honda BF50 (which is a touch lighter than the Yam) and that was fine, with no dnager of any swamping over the stern, although the flooding hull had sensibly been sealed off.

Thank you...I'll search for that arcticle. You are certainly right...the BF50 Honda is just a little over 200lbs so that might be worth a look, however I much prefer a Yamaha outboard over a Honda. Thanks for the input. I know these boats were never designed with the weight of a 4 stroke motor in mind.
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Old 31 December 2011, 18:26   #6
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Quote:
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What are your thoughts on wasting my time with a useless answer? The transom weight rating is 110KG. I am quickly reminded why I never bother with these forums.
not literally sinking
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Old 31 December 2011, 18:54   #7
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Thank you...I'll search for that arcticle.
The name of the magazine is 'RIB International'. Twas around 3 years ago.

As always, have a large pinch of salt at hand when reading such 'reviews'
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Old 01 January 2012, 03:58   #8
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What are your thoughts on wasting my time with a useless answer?
I am quickly reminded why I never bother with these forums.
Yet another new forum member who doesn't quite understand humour

Tugcaptain - if you have a read around the forums you'll find a wealth of knowledge and support - but being British humour will keep cropping up, along with irony and sarcasium. I understand the answer given as watch the total weight as the heavier you get at the back the more issues will be found with trim, balance, rear water entry (oe err) and so on. Not a literal sinking!!

It's just the way it is and not directed at any one personnaly - not often anyhow

Welcome and once you get the hang of such answers you'll be fine.
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Old 01 January 2012, 06:15   #9
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V true. Chewy is one of the most helpful on here, with over 4k posts.

He'll have meant well I'm sure. His opening gambit was welcome!
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Old 01 January 2012, 06:48   #10
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Yet another new forum member who doesn't quite understand humour

Tugcaptain - if you have a read around the forums you'll find a wealth of knowledge and support - but being British humour will keep cropping up, along with irony and sarcasium. I understand the answer given as watch the total weight as the heavier you get at the back the more issues will be found with trim, balance, rear water entry (oe err) and so on. Not a literal sinking!!

It's just the way it is and not directed at any one personnaly - not often anyhow

Welcome and once you get the hang of such answers you'll be fine.
Yep.

I've been on one with an early 4 stroke Yam 50 on and it was tail heavy. Wasn't a fan.
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Old 01 January 2012, 07:13   #11
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What are your thoughts on wasting my time with a useless answer? The transom weight rating is 110KG. I am quickly reminded why I never bother with these forums.
Hey fella, this isn't Ask.com - What's Your Question?. If this is your posting style, I can see why forums aren't for you. If you want an opinion/help/info, there's no shortage here.

Likewise, if you want a scrap...
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Old 01 January 2012, 09:53   #12
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What are your thoughts on wasting my time with a useless answer? The transom weight rating is 110KG. I am quickly reminded why I never bother with these forums.
Well I've got another 18 days offshore to pass so I can carry on if you like?
What I was meaning is that with a 50hp on flooding hull you could run the risk of swamping, I had a 2 stroke Yam 55 and the transom top was close to the water.

Oh Happy New Year too!

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V true. Chewy is one of the most helpful on here, with over 4k posts.

He'll have meant well I'm sure. His opening gambit was welcome!
Ahh thanks fella


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Likewise, if you want a scrap...
First day of the year I've already upset some one lol.
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Old 01 January 2012, 09:56   #13
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Hey fella, this isn't Ask.com - What's Your Question?. If this is your posting style, I can see why forums aren't for you. If you want an opinion/help/info, there's no shortage here.

Likewise, if you want a scrap...
I guess I don't have a "posting style"...too much to do to be wasting time on the internet to develop one, I guess. I was just looking for some advice and the first reply I got came across as sarcastic and rude to me. If my interpretation was wrong, I guess that's the risk of using humor in a passive-agressive internet forum. Speaking of passive agressive...no, I don't want a "scrap"...or whatever...this isn't pub room, tough guy.
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Old 01 January 2012, 10:01   #14
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I guess I don't have a "posting style"...too much to do to be wasting time on the internet to develop one, I guess. I was just looking for some advice and the first reply I got came across as sarcastic and rude to me. If my interpretation was wrong, I guess that's the risk of using humor in a passive-agressive internet forum. Speaking of passive agressive...no, I don't want a "scrap"...or whatever...this isn't pub room, tough guy.
I thought you'd have learnt by reading the other posts that my first post was a welcome one and a note of humour regards a 50hp 4 stroke been potentially too heavy.

Willk is again another person who contributes some very helpful posts and also like me, likes to have a bit of a lol.

If you want to gain help from this forum its probably best to be a little more friendly?
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Old 01 January 2012, 10:01   #15
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Originally Posted by TugCaptain View Post
I guess I don't have a "posting style"...too much to do to be wasting time on the internet to develop one, I guess. I was just looking for some advice and the first reply I got came across as sarcastic and rude to me. If my interpretation was wrong, I guess that's the risk of using humor in a passive-agressive internet forum. Speaking of passive agressive...no, I don't want a "scrap"...or whatever...this isn't pub room, tough guy.

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Old 01 January 2012, 10:01   #16
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Anyway...aside from the poster above, you all were very kind in "gently" letting me know that the joke is clearly on me here and my apologies to Chewy for a sarcastic response. I'm sure if he can see why getting that as a first post in a new forum set me off on the wrong foot

Guess the humor got lost somewhere on it's way back across the pond...either that or I'm too numb to recognize it


My thanks to the useful posts...for those that actually want to keep it on topic, I think I'll be looking for a low hour used two stoke Yam
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Old 01 January 2012, 10:05   #17
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Glad we've kissed and made up

Are you looking at getting an outboard in the US or one shipped from the UK?
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Old 01 January 2012, 10:07   #18
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A good sense of humour always goes goes down well on here TC, looks like you have adopted one already Happy New Year
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Old 01 January 2012, 10:11   #19
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Glad we've kissed and made up

Are you looking at getting an outboard in the US or one shipped from the UK?
DON'T let Chewy kiss you. He uses tongues.


The 50hp 2 stroke Yam with PTT really is the best option if you're going for a 50hp on it.It really will make you grin if you want to be a nutter and it's not overly heavy.

You could always go for a 40hp-it'll still be quick, but I much prefer the larger propped Yam 50 2stroke engines. Apart from anything else, if you need to tow anything with it, it'll be a breeze. It'll also stand on its prop if you want it to
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Old 01 January 2012, 10:12   #20
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I run 4 x sr4's with f30's on the back which I can get around 25kts from with the correct prop and 2 people on board on flat water.

The f30 and f40 are the same engine and weigh in at 89kg. The f50 is 110kg. I wouldn't want the transom any lower at rest and I'd imagine that extra 20kg would make a lot of difference to the way it sits and handles.
If funds allows I'd go for a new f40. Not much less power but a lot less weight so probably just as quick as the 50.
I'm not sure I'd want more than 40 on the back having driven one a few years ago. I've never driven one with 50 on but it will chine walk a fair bit with a 30 at WOT when trimmed out and one person on board. Ease of a bit, trim in or put another person onboard sorts it but a 50 must be scary!

I'm amazed at how much more efficient the new fuel injection f30's are than than the old triple carb versions. The 40 can't be that much more thirsty as its the same engine just detuned a bit, presumably by electronics or restricting the exhaust.

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