Four Stroke Engines

[Chris 55]

While I can't give you any feedback on 4 stroke outboards

other than the already known low noise factor and smooth

running with a 4 cycle engine

I can say that the difference between an early carby 2 stroke

and a late DI 2 stroke is like chalk and cheese

This is why the new generation DI 2 stokes are regaining lost

sales on the 4 strokes

Late DI engines definitely run smoother and quieter (in the water)

than what was previously available

Sorro has repower the old girl from a Force 120 (a good motor

when considering cost and technology available at the time it

was fitted) to a pre Etec DI Evilrude 115 and the first thing you notice

is the quietness, not forgetting smooth running and rate of responce

when you push the throttle

The first run after fit up was at Mooney, so after dropping the boat in

I parked the transport unit and went down to the jetty to get on board

Kev must have been having too much fun over the other side of the

river by the look of how he was flicking the boat around

As the boat came over to the jetty I thought it had cut out or been

turned off as it was inaudible, I was impressed

Out on the river and the phone goes off, Kev's

Never before could you stand next to the Force at any revs let alone

2500-3000 rpm as we motored along and talk on the phone

It all comes down to budget and what you feel is the best unit for yourself

and the boat's usage, so it means lots of time doing bum in seat testing as

it's the only way you can get to the bottom line on this sort of subject

Remember with outboard engines as with most most things no 2 may be the

same and hulls will make a difference to performance

So book yourself in for some wet tests and que the TOP GUN theme

Chris

[Nolongeramember]

So is a four stroke carby any louder than a four injected?

[warnie]

Roylo

To answer your question i went to retreive a rod and reel dropped overboard today

courtesy of one of my kids...............

And physically heard between mine a (4/stroke) and a mates 2 stroke who came over to

lend a hand.......... and can say i did not distinguish any difference in noise whatso ever underwater

..........things you do after reading a post...................Hyperthermia aside

i did not retreive the outfit........ but hopefully answered the question.................

Cheers Warnie

[a boat]

So is a four stroke carby any louder than a four injected?

Hi Roylo, no there is no major differnece in noise between a Carby and EFI 4-Stroke. The benefit of an EFI 4-Stroke is that you do not have carbies to worry about that can gum up and over time get out of sync and it is a very fiddly process to re-sync carbys on 4-Strokes and I for one am glad that most brands now run EFI. It was a real pain to get a carby 4-Stroke running right once they had a few years on them and got out of sync-you need expensive vacuum gauges and alot of patience.

What I would suggest you get if the noise at low speed (approx 1500 and down) is the most important factor to you, is an EFI 4-Stroke, do not buy a Carby 4-Stroke if you can get an EFI for about the same money. The other option I see for you is to save yourself even more money and get a basic carby 2-Stroke, that gets you to where you want to go and if only running for about 1 hour each outing, the extra fuel costs will not be that noticable. Then put the saving towards a Minn Kota, Jarvis Walker or Motorguide electric motor, which are hard to beat for noise-they do not make any.

Cheers,

Huey.