Avon Searider 5.4 engine

[zubol]

Hello,

I need to change my current engine (2 stroke Force 85 HP) for the new one.
I have a question for you. What size of engine would be the best for my RIB?
I went for our local shop and guys told me 75 HP 2 stroke might be little bit to small.

What you recommend? 90 HP? 115 HP? 2 or 4 stroke?

Thank you.

[Poly]

Depends what you want to do with it. A 50 HP 2 stoke will move a SR5.4 quite happily but not put quite the same grin on your face that the 85 would have. IIRC then the SR experts on here regard the "perfect" engine for a 5.4 as a 90HP 2 stroke.

[Tino]

Originally Posted by zubol

Hello,

I need to change my current engine (2 stroke Force 85 HP) for the new one.
I have a question for you. What size of engine would be the best for my RIB?
I went for our local shop and guys told me 75 HP 2 stroke might be little bit to small.

What you recommend? 90 HP? 115 HP? 2 or 4 stroke?

Thank you.

I have driven the clubs 5.4 woth a 60hp 4 stroke Yamaha. Its fine with a small load but sluggish when loaded. I personally would have gone for something bigger...perhaps 80..

[Downhilldai]

Originally Posted by Polwart

...the SR experts on here regard the "perfect" engine for a 5.4 as a 90HP 2 stroke Yam.

Fixed

[Poly]

Originally Posted by Downhilldai

Fixed

I very nearly wrote that...

[chewy]

From what I've read on here the Yam 90 is the perfect engine with the Twatsoo 90 following it.

[zubol]

What you think about Yam 115 V4? it is not too much?
and what about Mercury 75HP 2 stroke. Is it really too small?

[Neil Harvey]

Originally Posted by zubol

What you think about Yam 115 V4? it is not too much?
and what about Mercury 75HP 2 stroke. Is it really too small?

max is normally 90hp, but some were rated to 115 apparently

75 should be ok, although maybe a little slow especially if well loaded

[Searider]

I would think a 75hp will be fine. I had a 90hp Mariner on mine and didn't often think it was in any way underpowered.

Most of the time I ran around at mid to high 20's kts and 75hp would have been plenty.

However, having said that, if I were speccing an engine I would by choice have a 90.

[zubol]

What weight are we talking about? what is the max for the engine?
I am asking because 2 stroke Yamaha 90HP is 118kg where for instance Honda 90HP is 163kg

[diverbert]

I have a 90hp suzi driving my SR5,4 and know lots of people who sail them it's very fuel efficient super and quiet (has a lock on it to prevent re starting!!!)
14'x21' prop should do the trick really well.
Engine weighs 158kg

Yam 2 stroke 90 is super to but nog new available and i would make the same decision again.

see on Avon Searider - Home for few pics (look at member Rob Ubels)

115 is possible to faster but you hear it guzzling the fuel. (almost above the engine noise)
130 should go to but to crazy and to fast wouldnt do both

just take a 90 4s suzi or 90 2s yamaha

[olekils]

I just repowered my 5.4 this summer with a new Yamaha F70LA 4 stroke. I couln't be happier with the engine as it is lighter and smaller than the old 2 stroke merc 70 i replaced. I have a pilothouse on my boat and even with 2 people, surfboards and gear for the weekend, i still hit 29-30kts which is plenty for ocean running. The engine is quiet and quite good on fuel, i get 6-7 nm/gallon.
I read yamaha redesigned this engine as there are a lot of boats out there that were conceived for a 70 2stroke that suck with the extra weight of a 4 stroke, so they pulled tons of weight out.

[olekils]

F70 is 118kg

http://continuouswave.com/whaler/ref...70HotSheet.pdf

[CoachRib]

That weight was the reason I choose Yam 70 for my new XS 530

[SurfnRide]

Been running a 50 HP 2 Stroke Tohatsu on my 5.4 50 miles offshore in Southern California fishing for big Blue Fin Tuna Yes I get a lot of crazy looks but getting pulled around by a 50-100+ lb BFT is hella fun.

[tinker]

Originally Posted by SurfnRide

Been running a 50 HP 2 Stroke Tohatsu on my 5.4 50 miles offshore in Southern California fishing for big Blue Fin Tuna Yes I get a lot of crazy looks but getting pulled around by a 50-100+ lb BFT is hella fun.

Sounds fun.......a picture would help tell the story. What do you do with the BFT once its caught, keep it,.eat it,.sell it?

[SurfnRide]

I have a really big reliable kill bag on board packed with ice. Bleed the tuna and then bag it. Cut the tail and head off if its too long for the bag wrap a garbage bag around the ends to keep the freshwater ice/water off the meat as much as possible.

I bring it home and fillet it up. Give the fish a quick saltwater wash and pat dry before vacuum sealing the meat in 4 mm bags and freeze it.

Give a lot to friends and do sushi rolling parties for the 1st month I have it. Then it turns into searing grade tuna.

I'm almost 50 and don't document too much stuff but I'll see what I can dig up pic wise.

I have a 24 gallon aux tank behind the driver seat that I built a slip over 2nd chair setup so I can go with 1 friend. 8 gallon tank in front of the steering column. Has a flip up bimini if the sun gets too intense and comms. Do lobster hooping and spear fishing with it also.

It's a fun little boat. Hits about 23 mph wide open on a flat day. Bought it for $3K off Craigslist with the Pacific trailer.

[tinker]

Sounds a blast, how far do you travel? Huge amount of fuel to carry.

[SurfnRide]

We launch out of Point Loma San Diego and work the US and Mexican banks. 425, 43, 302 etc... Figure we probably have around 175 mile range. Maybe a bit more if we go easy on the throttle. I'll run it out between 30-40ish miles and then work the banks. Leaves me enough fuel to feel safe.

Just keep an eye on bloody decks and go where the bite is reported at. One of my friends kids is a deckhand working on becoming a Captain so he can feed us what he is hearing from the Captains on the cattle boats. Get a little ahead of the bloody decks/internet chasers.

https://imgur.com/a/bmldMXt

[SurfnRide]

Delete.... figured out how to post the link on my last post