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Orca 8hp Standard Shaft 4-Stroke Outboard Engine

Orca 8hp Standard Shaft 4-Stroke Outboard Engine


This item will be released 18 June 2024.
  • Warranty: 3 Years
  • Weight: 26kg
  • Engine Type: 4-Stroke, Single-Cylinder
  • Shaft Length: Standard (Short)
  • Starting System: Manual
  • Save money on Engine & Boat packages. Use code “PACKAGE-DISCOUNT
Availability: 4 available for pre-ordering SKU: OR8-S Tag:
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These 8hp 4-Stroke outboard engines from Orca are a standout game changer model in the range. This is a single-cylinder delivering more power for its weight than most of its rivals. The well-known brands in the industry are using a twin-cylinder design at 8hp, but that means more weight and more costly to manufacture and run. With their smart, stylish looks, these Orca 8hp engines are light and easy to handle, weighing the same as our Orca 6hp. The Orca 8hp outboard motor is convenient to store and use, offering the power you need to hit the water with confidence.

This Orca 8hp engine has a compact size, large carrying handles and a built-in fuel tank of 1.4ltr capacity, enhancing its portability. It will switch between the built-in fuel tank and a separate fuel tank (not included) at the flick of a switch. This engine design gives you low fuel consumption, simple controls and low noise and vibration levels, along with Orca Outboards reliability promise. This is a 17.5″ (445mm), short shaft model.

For families wanting to get on the water easily and cheaply. Perfect for SIB’s, Dinghys, Tenders or anything else that needs a small outboard engine.

  • Single Cylinder
  • 139cc
  • 8hp @ 5000rpm
  • Carburettor
  • Manual Start
  • 26kg
  • CDI Ignition
  • 17.5″ (445mm) Short Shaft
  • 3 Year Warranty
  • More information available on product specifications

Please note: Outboard dispatch time may vary from 2-7 days usually and 2-3 weeks during busy periods due to PDI inspections. Contact us for further information.

Product Info & Care

Weight35000 g

Orca Outboards

Bore Stroke

62 x 46

Boxed Size (cm)

106 x 65 x 43

Cooling System

Water Cooled

Engine Displacement


Engine Type


Fuel Type


Gear Ratio


Gear Selection

Forward + Neutral + Reverse

Horse Power


Idle Speed r/min (Neutral)


Inbuilt Fuel Tank Capacity


Maxpower Output (KW/r/min)


Net Weight


Outboard Range


Shaft Size


Starting System



3 Years

8 reviews for Orca 8hp Standard Shaft 4-Stroke Outboard Engine

  1. 5 out of 5

    Cory (verified owner)

    Great little outboard, pushed my 3330 Vee along very nicely 😊

    • Nicola Middleton-Groom

      Thanks for the review, Cory. Hope you like your Orca 12hp just as much.

  2. 5 out of 5

    Adrian (verified owner)

    Really nice engine. Works and starts well. It pushes my 3.4m dinghy along nicely. Only minor hiccup was that the fuel filter was faulty. However, I emailed BoatWorld and they sent me another one immediately. So that was sorted out painlessly. It would be nice to get a little more documentation with it on how to service/ maintain/ use. But other than that a really good engine and good service from BoatWorld.

  3. 5 out of 5

    Arran Agate

    Good power, light enough to carry on my own and great to have the build in fuel tank as well. Very pleased with it.

  4. 5 out of 5


    A great engine and very reliable. It’s powered our boat with 5 people on board, towing a sailing dinghy against the tide in a force 5!
    The team at Boatworld are fantastic and super helpful. Would highly recommend!

  5. Corey Crowdy

    Hi Del. Many thanks for taking the time to give us your feedback on the Orca 8hp. I am very disappointed to hear that you did not receive a call back about your outboard, I can only apologise for this. Regarding the white smoke, it is possible that this was oil burning off after transport. If you or your friend still have access to the outboard we would be happy to assist with any diagnosis or suggestions for ensuring you are getting as much power out of the outboard as you should be. Thanks.

  6. Corey Crowdy

    Hi Phillip. Thanks for taking the time to tell us about your experience with your Orca 8hp. I can only apologise for the confusion with fuel filters this was as a result of sending out a sealed unit rather than a screw top filter. Regarding the issues you are having with a lag with accelerating, I will be in touch with some information on this and we can try to get this sorted asap for you. Thanks for the feedback on having to do the work remotely, these are just suggestions we are always happy to undertake the work ourselves, but we will be more clear about this moving forwards. Thanks.

  7. 5 out of 5

    Russell rogerson

    8hp orca short shaft and 330 pro been on loch etive 5 times with it as soon as you get going the boat gets right up on the plane and your off what a buy would be happy to get from boatworld again well done team keep up the good work

  8. 5 out of 5

    colin livingstone (verified owner)

    purchased the 8hp orca short shaft along with the black 330 pro, great outboard and great boat, pushes boat along nicely on loch tummel where i keep it at my caravan, never had any problems with boat or outboard, all good.

  9. 5 out of 5

    Jason Gibson (verified owner)

    Like a lot of small boat owners, I am limited to the weight I can apply to my transom and of course this limits my power options as well. I have an open 12ft aluminium, shallow ‘v’ hull. It’s a little heavier than a lot of the more modern aluminium offerings of today, it was built in Finland in the late 80’s and is all welded and has a very thick hull plate, still a light boat but 5hp was simply not enough to get her on the plane. I had this engine from a previous boat and thought I’d try her out, thought about going up to a 8 or 9 2 stroke keeping the engine down under 30kg.
    well, when they say this is a game changer, it really is ! 8hp 4stroke under 30kg, unheard of, brilliant, what can I say, I just had to buy one. A friend of mine has had a 6hp Orca now for approx. 2 years and it has never missed a beat, he loves it, quiet, smooth and pushes his 340 SIB along nicely. I have put the Orca 6hp on my boat and it will Plane, just with weight forward, so I am pretty confidant the 8hp will get her there. Will post another review, once I have run her for a wee while. All I can say for now is, Boat World are a pleasure to do business with, so helpful and friendly and great products, all at superb prices, hopefully it will stay that way 🙂 I unboxed the engine as soon as it arrived on Wednesday and she’s a cracker, oil was supplied ! fired her up for a short spell, started 2nd pull, very pleased, thank you all at Boat World, Jay, Dumfries & Galloway

  10. 5 out of 5

    Jason Timothy Gibson

    2nd Review…Update, I have now been using this engine for 4 months now and as expected, it’s a great engine, never missed a beat. for a single cylinder of 140cc or 8hp, it’s not quite as noisy as I would of expected, so that’s a wee bonus. Again with a larger single cylinder you would also expect a good amount of vibration, but I’ve got to say, it’s no more than I have experienced on any of my 4,5 and 6hp units, again, I’m impressed. Fuel economy has been superb and better than I expected. I started using this engine on an aluminium 12ft open boat with a shallow ‘V’ hull and it performed impeccably, however, I have now switched to a 3.1M poly boat, (Whaly 310) and again this engine is so well matched. The new boat is rated to 10HP Max but I thought I’d stick with my Orca 8hp, so pleased I did, because of the reduced rate, the boat doesn’t suffer from bow rise as much and she is quick to flatten out to the plane with relative ease 🙂 If like me, you run a small 10 to 12ft open for lochs and occasional inshore rock hopping or a SIB and want the ease of lifting and carrying a light weight unit with plenty of power, look no further, the Orca 8hp is a cracker, thanks again Boat World ! JG, Scotland.

Add a review

    What length is warranty please
  1. 0 votes
    QWhat length is warranty please

    we offer 3 years with our Orca outboard 


    we offer 3 years with our Orca outboard 

  2. Just test run my new 8HP for the first time in a water tank. All seems ok apart from the tell-tale water outlet is spraying out rather than the conventional single narrow stream of water. Is this OK / normal? Roy Westland
  3. 0 votes
    QJust test run my new 8HP for the first time in a water tank. All seems ok apart from the tell-tal...... Read more

    sometimes the hole can get a little blocked with contaminants in the water. 
    you should be able to clear this with a pick or skewer 


    sometimes the hole can get a little blocked with contaminants in the water. 
    you should be able to clear this with a pick or skewer 

  4. Hi just purchased the 8hp orca. I can see I need to add the oil. But to check does it come with gearbox oil pre added. Cheers keith
  5. 0 votes
    QHi just purchased the 8hp orca. I can see I need to add the oil. But to check does it come with g...... Read more

    Hi Keith. All our outboards come with a bottle of engine oil, which is the correct amount for the outboard. The gear oil is already in the outboard as it in a sealed unit. Thanks.

  6. Have you got mounting height specifications as I want to use this offset on a 17.5ft v Hull speedboat as a Auxiliary engine and not sure of the standard or long shaft engine. Kind Regards Andy
  7. 0 votes
    QHave you got mounting height specifications as I want to use this offset on a 17.5ft v Hull speed...... Read more

    As an auxiliary to a speedboat, it would normally be a long shaft engine you require. The length of the short shaft engine from the top of the mounting bracket to the cavitation plate (which is what should align as true as possible to the bottom of the hull) is 17.5in. The long shaft is 22.5in, here is a link to the Orca 8hp Long Shaft Engine if that would be the better engine for you. 

  8. Is it ready to use in salt water?
  9. 0 votes
    QIs it ready to use in salt water?

    Yes, this engine can be used in saltwater but we suggest using a product called Blu Thru which removes the salt build up in your engine after using it on the sea. If you don't use a product like this the salt builds up in your engine which can cause issues.

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