1. Welcome to Jetboaters.net!

    We are delighted you have found your way to the best Jet Boaters Forum on the internet! Please consider Signing Up so that you can enjoy all the features and offers on the forum. We have members with boats from all the major manufacturers including Yamaha, Seadoo, Scarab and Chaparral. We don't email you SPAM, and the site is totally non-commercial. So what's to lose? IT IS FREE!

    Membership allows you to ask questions (no matter how mundane), meet up with other jet boaters, see full images (not just thumbnails), browse the member map and qualifies you for members only discounts offered by vendors who run specials for our members only! (It also gets rid of this banner!)

    free hit counter

RPM Inconsistencies

Discussion in 'Rotax Engine Topics' started by YinzerVRX, Oct 4, 2017.

  1. YinzerVRX

    YinzerVRX New Member

    Messages:
    5
    Location:
    Pittsburgh
    Ratings:
    +3 / 1
    Boat Make:
    Chaparral
    Year:
    2016
    Boat Model:
    VRX
    Boat Length:
    20
    Hi All,

    I'm new to boating and jet boats in general. I currently own a 2016 203 VRX with twin 150's. I've taken it out on the water 3 times since I bought it and noticed the top end RPM seems to vary. The first day out she was turning around 7200 and same with the second outing. I had her out today and she only topped out at 6900-7000. I used the same Pump BP 89 octane fuel each time I gassed up. The manual says it should be maxing out at 7550 but never seen that. Any reason to why I'm seeing low RPM's?
     
    • Dislike Dislike x 1
  2. itsdgm

    itsdgm Jetboaters Captain

    Messages:
    3,077
    Location:
    Rancho Santa Margarita, California
    Ratings:
    +1,708 / 14
    Boat Make:
    Yamaha
    Year:
    2007
    Boat Model:
    AR
    Boat Length:
    21
    Assuming that you bought the boat used, One simple thing to change out would be the spark plugs. It's common for guys to use fogging oil during long periods of storage. So it could be possible that the plugs are fouled.

    Anyway, hope you figure it out. Welcome to the site and congrats on the boat!!!
     
  3. Vandyman

    Vandyman Well-Known Member

    Messages:
    65
    Location:
    Brentwood, TN
    Ratings:
    +39 / 0
    Boat Make:
    Chaparral
    Year:
    2015
    Boat Model:
    VRX
    Boat Length:
    22
    I have the 223VRX with twin 200's and RPM seems to max out around 7200. At about 40 hours I have yet to see anything above 7200. It does have a limiter that limits RPM to 6800 or so until 10 hours are logged.
     
  4. YinzerVRX

    YinzerVRX New Member

    Messages:
    5
    Location:
    Pittsburgh
    Ratings:
    +3 / 1
    Boat Make:
    Chaparral
    Year:
    2016
    Boat Model:
    VRX
    Boat Length:
    20
    Thanks for the reply's. Yes I bought the boat used with 13 hrs on it. I'll have to look at the spark plugs to see what they look like. Where I live gas stations typical change to the " winter blend" October 1st. I'm thinking this could have an effect too.
     

Share This Page