Searider 4.7m Engine choice

[69cmw]

Looking for advice on what engine to put on the above boat, also what sort of speed and consumption could I expect.

[Pikey Dave]

Originally Posted by 69cmw

Looking for advice on what engine to put on the above boat, also what sort of speed and consumption could I expect.

A 2 stroke, the biggest it will take, the newest you can afford. Consumption depends on engine & how you drive it. 1l/nm is a ball park figure.

[Downhilldai]

I run an SR4.7 with a Merc F50Efi 4-stroke.
Max speed around 32-33kts
Fuel consumption at steady 28ish kts: 0.6l/nm

I used to have a Twatsoo 60hp 2-stroke on there, which was around 1.5 kts faster, but when cruising at 28kts, it delivered 1.0l/nm

If money were no object, I'd suggest a Yam F70 4-stroke, but they're £7295.
If you want to spend £2k-£2.5k, then I'd suggest a 2003 onwards Merc/Mariner/Yam 50/60hp 4-stroke (Efi)
If you want to spend £1500, then look out for a late 1990s Yam 60/70 2-stroke, but these are rare.
If you want to spend around £1000, then an older Yam 60/70 or a Soozook DT65 from early-mid 1990s would be my choice.

[woody73]

Originally Posted by Downhilldai

I run an SR4.7 with a Merc F50Efi 4-stroke.
Max speed around 32-33kts
Fuel consumption at steady 28ish kts: 0.6l/nm

I used to have a Twatsoo 60hp 2-stroke on there, which was around 1.5 kts faster, but when cruising at 28kts, it delivered 1.0l/nm

If money were no object, I'd suggest a Yam F70 4-stroke, but they're £7295.
If you want to spend £2k-£2.5k, then I'd suggest a 2003 onwards Merc/Mariner/Yam 50/60hp 4-stroke (Efi)
If you want to spend £1500, then look out for a late 1990s Yam 60/70 2-stroke, but these are rare.
If you want to spend around £1000, then an older Yam 60/70 or a Soozook DT65 from early-mid 1990s would be my choice.

I thought the Yam F70 was to heavy for the transom, thinking of a Yam 75 2stroke for mine

[69cmw]

I thought they both weighed about the same, 119-120kg?

[Rogue Wave]

That's correct for the 75 and you don't want to put that on your 4.7

the F70 is 114 KG and it's a superb little lump. We have 1 and the fuel economy is superb. I'm probably going to buy another 1 and put it on my 4.7 but my heart and experience says that it should be a 70 BETOL or AETOL its a very very empathetic Rib/engine match as that weighs around 105kgs

[Downhilldai]

Back in the day (early 1990s) a pal of mine had an SR4.7, which he fitted a brand new 90 Yam onto, based on the theory that it was the same basic motor as the Yam 75, which was only a little bit more than the max hp rating of the boat. Twas a fiery little beast

[Downhilldai]

Originally Posted by woody73

I thought the Yam F70 was to heavy for the transom, thinking of a Yam 75 2stroke for mine

Max transom weight is 265lbs (120-ish kg).

[woody73]

Originally Posted by Downhilldai

Max transom weight is 265lbs (120-ish kg).

If I have an A frame fitted to the transom do I have to subtract the weight of that from the maximum transom weight?

[hamish]

How about this Yam 70 2-stroke on eBay item # 140875491844 ? (not me selling it)

[whisper]

Originally Posted by hamish

How about this Yam 70 2-stroke on eBay item # 140875491844 ? (not me selling it)

Yep I would go for that, had one on my 4.7 awesome! 36/37 knots

[colcreate]

Nothing to do with me, but someone thought this was a good idea on a 4.7!

AVON SEARIDER RIB + MARINER 100 + TRAILER | eBay

Is this a genuine advert?

[Rogue Wave]

I think both of those Yammies on ebay have been sold

[Boats&Outboards]

I reckon you got a deal there Stu ?

Peter @ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007

[J.W.W.]

I totally agree on that (except for the ol Suuz 65.
Buying a new Merc/Mariner F60efi would give you a nice "light feeling" quick setup and has a lot better price than the YamF70.

Originally Posted by Downhilldai

I run an SR4.7 with a Merc F50Efi 4-stroke.
Max speed around 32-33kts
Fuel consumption at steady 28ish kts: 0.6l/nm

I used to have a Twatsoo 60hp 2-stroke on there, which was around 1.5 kts faster, but when cruising at 28kts, it delivered 1.0l/nm

If money were no object, I'd suggest a Yam F70 4-stroke, but they're £7295.
If you want to spend £2k-£2.5k, then I'd suggest a 2003 onwards Merc/Mariner/Yam 50/60hp 4-stroke (Efi)
If you want to spend £1500, then look out for a late 1990s Yam 60/70 2-stroke, but these are rare.
If you want to spend around £1000, then an older Yam 60/70 or a Soozook DT65 from early-mid 1990s would be my choice.

[69cmw]

The 70hp Yamaha that was supposedly sold on Ebay is back on again.
Any info on this engine?

[spartacus]

No, but the anti-cavitation plate is damaged. There's another Yamaha gearbox on Ebay described as 'mint'... you decide!
YAMAHA 60-70HP Outboard Lower Unit (Gearbox) Mint Condition Blue | eBay

[whisper]

I think there's about 4 x Yam 70's on the bay at the moment

[paddlers]

That lower units on sale by that well known dealer dan cooper or outboardmotorseurope or outboard spares or cambridge outboards or outboards 12..............bargepole !!

[Gramas]

This is not far from me
Ebay Item number :321027907154