Jump to content

4stroke v 2stroke


codpiece
 Share

Recommended Posts

Hi Codpiece

 

Welcome to the best small boat fishing club online and the best real one anywhere on the South Coast.

 

Good little boat the Longliner, but with her displacement hull the only thing you'll get more of with all that Hp is fuel consumption.

 

A 15Hp is a lot for that boat and 10Hp will be plenty to push you through anytide run at her normal displacement speed.

 

So:

1) Use a slightly smaller engine to save money on the purchase and also on fuel.

2) A 2 stroke is likely to cost considerably less to purchase and service but

3) A 4 stroke will be very much sweeter to live with and cheaper on fuel

 

If pure budget isn't the issue then I'd be looking to get a 4 stroke, if budget is more of a question then go with 2 stroke.

 

Good luck

 

Tom

Link to comment
Share on other sites

Hi codpiece

 

I think you'll find that is the maximum rated engine size rather than the ultimate engine size.

 

The longliner is a very good "Displacement" hulled boat.

It is designed to go through nasty weather slowly, but steadily.

 

Another PBSBAC member (Afishionado) quotes a formula for the maximum speed for a displacement hulled boat.

 

The formula is the square route of the hull length x 1.5.

 

So the square route of 16 feet is 4 x 1.5 gives a maximum speed of 6 knots.

 

That speed could easily be achieved in fair conditions with a 6Hp engine. Going to a 10Hp engine would simply mean that you will be able to keep punching through at 6 knots in far worse conditions.

A 10Hp, in my opinion, is by far and away the best maximum size for your boat.

Anymore Hp will simply dig the boats stern in a bit and push a big hump of water in front of you. You won't go any faster (unless the tide is with you), but yuo'll burn upwards of twice as much fuel.

 

It's obviously your choice, but I promise that there is no need for an engine that size. It will work with the boat, but it will be a waste of money.

 

Link to comment
Share on other sites

Having used a Longliner in my previous club for a number of years I would agree with Tom that a max of 10hp would be fine. I know the Orkney advert shows a Honda 15hp but I think this is way overkill.

 

I use to fish on the east coast at Felixstowe and launch from the beach! We needed a good engine to get away from the breaking waves quickly and we used 5hp Seagull engines which were fine and then got a 5hp 4-stroke which went even better.

 

Save your money if buying new and get a cheaper lower horsepower engine.

 

Just a thought, if running a 2-stroke at tickover for a length of time they can cut out/stall or not respond quickly when the throttle is opened, just one of those things with 2-strokes. If you intend to do trolling around the coast go for a 4-stroke if you can.

 

Regards

 

Coddy

cool.gif

 

Oh forgot to add welcome to the best forum wink.gif

Link to comment
Share on other sites

personally I would get the Tohastu 9.8 2 stroke for that boat - it's the lightest in class with loads of torque. Easy to remove for storage and safety if you choose (sub 30kg?)

 

I haven't experienced oiling up with 2 stroke OBs for a long long time.

 

equally the noise is as much model dependant as 2 v 4 stroke at these sizes

 

On the other hand it may not be available anymore as a new unit sad.gif

 

 

Link to comment
Share on other sites

personally I would get the Tohastu 9.8 2 stroke for that boat - it's the lightest in class with loads of torque. Easy to remove for storage and safety if you choose (sub 30kg?)

 

I haven't experienced oiling up with 2 stroke OBs for a long long time.

 

equally the noise is as much model dependant as 2 v 4 stroke at these sizes

 

On the other hand it may not be available anymore as a new unit

 

 

Seems to be still available from Holes Bay Marine see price list on link

 

http://www.holesbaymarine.co.uk/tohatsu/Tohatsu2stroke.htm

 

Reviews keep stating that the 2 Stoke Tohatsu Engines are Bomb Proof however no experience with them personaly

 

Peteg

Link to comment
Share on other sites

Seems to be still available from Holes Bay Marine see price list on link

 

http://www.holesbaymarine.co.uk/tohatsu/Tohatsu2stroke.htm

 

Reviews keep stating that the 2 Stoke Tohatsu Engines are Bomb Proof however no experience with them personaly

 

Peteg

They use this make of engine for Zapcat racing, it's the only manufacture that guarantees the engine for racing!

In fact it is the only engine allowed for racing Zapcats!

 

Coddy

cool.gif

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...