2003 Mariner 40hp 2 Stroke V 2003 Mariner 40 hp 4 Stroke??

mattfx · 19 August 2011, 12:32

Please forgive another blindingly simple question (which I dont know the answer to...) - what is the difference - in terms of performance, economy, weight, ease of use etc etc between a Mariner 40hp 2 or 4 stroke??

Thanks!

Matt

Downhilldai · 19 August 2011, 13:17

Is it the 2-stroke a 2 cylinder (Yam based) motor?

mattfx · 19 August 2011, 13:54

**Thicky Alert** - Dont know is the answer. I am trying to replace my Mariner 15HP 4 Stroke (2004) with an equilivent 40HP - which is the maximum my 4M Zodiac Rib can take supposedly.. Ive found a decent looking Mariner 40HP 2 Stroke on ebay (, and I was wondering whether moving from a 4 to 2 stroke is a backward step - like I said - Im something of a novice with engines! Cheers M

Downhilldai · 19 August 2011, 15:03

I see there's a 2003 Mariner 40 2-stroke ex-RNLI motor on ebay at the moment. These are Mercury derived motors and would be lighter than the 4-stroke 40hp Merc/Mariner, if this is a concern for you. Take care with ex-RNLI 40hp motors as the shaft length may not be compatible with your boat. Measure your transom height from the keel to the top: if it's 20", then the boat needs a longshaft motor, whereas 15" transoms need a standard shaft. Most ex-RNLI 40s are standard shaft, but some are extended to mid-shaft (18")