Stopping and starting

Discussion in 'Motorhome Chat' started by Mattyjwr, Aug 8, 2014.

  1. Mattyjwr

    Mattyjwr Funster Life Member

    Joined:
    Aug 18, 2013
    Messages:
    2,522
    Location:
    Beds
    Ratings:
    +7,265
    We have a 16 yr Merc 312 and I wonder what the optimum time is for turning off the engine - is it better to leave it running while stationary for x mins or turn it off? What is the shortest time it is worth turning the engine off for?
     
  2. Tootles

    Tootles Funster Deceased RIP

    Joined:
    Sep 14, 2013
    Messages:
    9,513
    Location:
    Lancaster
    Ratings:
    +48,854
    If you have a turbo, and/or you have been 'pulling hard' before you stop, it's recommended that you let the engine idle for a few mins before switching off.
     
  3. TheBig1

    TheBig1 Funster Life Member

    Joined:
    Nov 27, 2011
    Messages:
    10,932
    Location:
    Dorset
    Ratings:
    +20,609
    above advice is correct....let the turbo spin down and cool before switching off. probably about 2 minutes. then switch off if its going to be another 5 minutes. all depends on the health of the starter and charging systems though. no 2 older vehicles are the same
     
  4. DBK

    DBK Funster

    Joined:
    Jan 9, 2013
    Messages:
    12,871
    Location:
    Plympton, Devon
    Ratings:
    +30,634
    Putting aside turbo issues those on mpg economy competitions will turn off the engine after as little as 30 seconds - but this is with petrol engines and the optimum could be a bit longer for diesels. However, in a queue, think of those stationary near you and turn it off! :)
     
  5. Mattyjwr

    Mattyjwr Funster Life Member

    Joined:
    Aug 18, 2013
    Messages:
    2,522
    Location:
    Beds
    Ratings:
    +7,265
    No turbo. The system seems fine. Diesel engine which regularly gets treated but can be a bit smokey so I tend to turn it off but wondered whether I would generate more emissions by turning it on and off regularly or leaving it on.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice