Avon SR4 with 25 HP - Would it work - Page 4

badbaws · 24 August 2012, 22:18

However.. means can do it in stages!

Mextli · 24 August 2012, 22:23

My motor is very new, and i'm trying to sell it and get an older 50/40 HP thats not visually in the best condition. Preferred Motors are as usual Yamaha or Mercury.

I then have my 2 hp outboard for emergencys.

Mollers · 24 August 2012, 23:36

[QUOTE=Mextli;483416]Sorry for my absolute incompetence, but what is 2-pack? ):[/QUOTE

2pac.com | The Official Website

Mextli · 25 August 2012, 08:13

Thanks

i don't fancy hip-hop though...

Mextli · 25 August 2012, 16:38

50 HP is the max hp that the SR4 can take... Or is more possible?

Nos4r2 · 25 August 2012, 18:43

You don't really want to put more than 50hp on one-they are INSANE with 50hp. Any more and you can't really use it unless it's mirror calm.

Mextli · 25 August 2012, 18:51

Ok then I'll go for a 50 HP long-shaft.

Where i live there are lots of 60 hp ones cheap...

Someone i know has reinforced the hull and is running the thing with 85 hp

Max... · 25 August 2012, 19:21

Can any of you SR longtimers (Nos etc?) comment on my earlier post re, lighter 40 vs 50 etc? Cheers chaps.

Mextli · 25 August 2012, 19:41

I'm propably going to get a "heavy" Merc 500 Thunderbolt, though I'll have the old set - up with the seats up front and the motor in the back

Nick Hearne · 25 August 2012, 23:10

Quote:

Originally Posted by Max...

I seem to remember from previous topics that a SR4 with a (lightweight) 40hp 2S came very close to the heavier 50hp 2S in performance (pick up is a prioroty rather that a few more kts on the top end) - can anyone confirm this and suggest which 40 is the one to aim for? I'm looking in the near future for the lightest weight SR4 rig I can find to beach launch (in suitable seas) 2 up.

And the fuel consumption at WOT per hour?

I have the 50hp 2st yam power tilt & my brother inlaw had one with a 40hp 2st with out power tilt & it could keep up with me no problem same sort of fuel consumption just if you do a lot of beach hopping it is a right pain not having PTT Nathan on here bought it if you want more info!
Look at just under a litter per mile

Jonny H · 26 August 2012, 10:50

Ive got an SR4 with a 40 hp 2 stroke PTT Mercury which i've tried to keep as light weight as poss and find is a well balanced setup
After experimenting with different props i get good top speed and acceleration and fuel economy is good too
I think the engine weighs around 76 KG

Nos4r2 · 26 August 2012, 11:24

Quote:

Originally Posted by Max...

Can any of you SR longtimers (Nos etc?) comment on my earlier post re, lighter 40 vs 50 etc? Cheers chaps.

Depends on the 40 and the 50hp. A Yam 40hp is better than a Merc Thunderbolt 500 for example, but a with good PTT 50hp Yam/later Merc etc 2 stroke it will be a really fun beast.

Mextli · 26 August 2012, 19:41

So if i am running a thunderbolt with the old set up(seats up front) there will be problems? will there be too much weight in the back?

Jonny H · 26 August 2012, 20:07

I don't have the weight of the old thunderbolt Merc but a 1981 Merc 50 weighs between 76 KG and 87 KG depending on model spec and the thunderbolt being the same 4 cyl engine would be ok
In comparison with engines from say 1984 onwards if yours is in good condition i think you would be looking at between 40- 45 Hp with that engine

Mextli · 26 August 2012, 20:36

Ok so the Thunderbolts are ok

In germany, most 50 HP outboards are Thunderbolts, and they are cheap, so

Nos4r2 · 27 August 2012, 01:06

A Thunderbolt will push it ok,I ran an SR4 with one on for a season. It'll go like it's got a 40hp Yam on it, and be a bit bum heavy and use more fuel than a later 50hp.

Ie, you'd be better off with a 40hp Yam or a newer 50hp with PTT, but it'll do the job.

Mextli · 27 August 2012, 08:01

Quote:

Originally Posted by Nos4r2

Ie, you'd be better off with a 40hp Yam or a newer 50hp with PTT, but it'll do the job.

Winter is coming now, and i'll see if i might get one at a reasonable price.
The boat has to be operable around christmas, so i still have almost half a year

Max... · 27 August 2012, 09:22

Thanks for the info. Is there a particular model 40 2 stroke in the Yam range or others to make sure to get (say from the last 15 years) - ie are some 2 cylinder or 3 cylinder?

If not Yam what is the best alternative makes for a lightweight?

Jonny H · 27 August 2012, 11:03

I have a Mercury 2 cyl 40 ELPTO year 2000 which weighs 75 Kg
I think the Yam 40's were all 3 cyl so will be a smoother engine but will be a bit heavier about 80 Kg with power trim

Mextli · 27 August 2012, 11:10

i'm looking at the 4cyl Mercury 500 Thunderbolt, possibly with a Panther Power-Trim bracket to fit after trial-runs.

First i have to sell my old 25 hp though ...