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  1. #11

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    Real world riding with other SVHO skis on the same ride. Are you able to get the same consumption as a NA ski with your SVHO both running 50-60mph


  2. #12
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by YYZ View Post
    Real world riding with other SVHO skis on the same ride.

    Are you able to get the same consumption as a NA ski with your SVHO both running 50-60mph?
    The fuel consumption varies depending on the hull, the water conditions and the rider.

    The SHO engines seem to be thirstier than SVHO.

    FX hull models tend to burn more than the lighter and smaller current generation 2015 onwards VX HO (now called GP1800R HO). I do not have any experience with the new-for-2020 FX hull models.

    The HO engines seem to consume noticably more as they push closer to wide open throttle while cruising. So the chosen cruise speed can really affect the HO consumption. Running the VXR close to redline to 'keep up with' a fast crusing SVHO seems to bring the overall fuel demand fairly close.

    The GP1800 SVHO, as we typically run them in a group ride, does burn a little more than the VXR (HO 1.8 non-supercharged). The delta is maybe 10-20% more fuel burn, not double. A friend has both GP1800 SVHO and 1.8 VXR (same 70 litre capacity fuel tank in all). We have ridden alongside them mutliple times.

    The common scenario is to return to the launch point with the SVHO machines showing a low fuel warning, while the VXR has one bar remaining. Refilling them at the gas station, the VXR will require a few litres less to refill to the top.

    All our SVHO have Stage 1 Plus tunes, aftermarket Solas impellers and ride plates. The net effect is to marginally improve our SVHO fuel economy at mid-range throttle and cruise speeds as the SVHO engine turns less RPM for the same speed.

    With heavy throttle of course the SVHO fuel consumption is higher. But we are also going ~130Km/hr.

  3. #13

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    Good to know your experience, I know that some of my friends are very trigger happy maybe that contributes to the difference.

    So as a long distance rider not a racer what would your recommendation be HO or SVHO?

  4. #14
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by YYZ View Post
    ...

    So as a long distance rider not a racer what would your recommendation be HO or SVHO?
    Recommending a PWC for someone else can be tricky. Our preferences and priorities are probably different from someone else.

    For ourselves we chose the 2017 GP1800 SVHO. We still like them very much. Almost perfect for our uses. This is the story.

    We already had years of experience riding distance on older non-Yamaha PWC. Those machines were capable (barely) of 100Kph GPS speeds and had rather good cruise range due to relatively large fuel tank capacity. We would often group ride with supercharged Seadoo riders. We could keep up, but our throttle was wide open a lot of the time while they were cruising along mid-throttle.

    Often the supercharged Seadoo riders would be thinking about finding a marina to refuel while we still had over half tank. It was not unusual for us to return to the launch ramp after a full day group ride with fuel remaining (having purchased none during the ride) while the Seadoos with us not only had refueled mid-day, the low fuel warning buzzer was sounding when they got back. Yes, those Seadoo have somewhat smaller 60 litre fuel tanks, but they also seemed to burn significantly more fuel over the same distance.

    For us the top priority was choosing a hull (the wet part) that would be ‘quite good’ in medium-rough water and with trustworthy handling. Consistent, competent ride characteristics and not fatigue inducing. An expectation of mechanical reliability, of course. Appearance, colour and ‘looks’ were well down the list.

    Why did we not choose the Yamaha FX, with the larger hull, more weight and is generally regarded as the best rough water hull Yamaha makes? Well, we wanted hulls that would respond readily to rider input and body english - generally still have the ability to be ‘playful’. The lighter weight of the GP1800 appealed along with the more compact overall hull size.

    Having ridden for years with many other Seadoo riders on various Seadoo models and reading many other Seadoo owner experiences on these forums, Yamaha became my preference. For several years we had been looking for our ‘next’ PWC, but none of the offerings seemed ‘just right’. We liked the Yamaha VXR but wanted a bit more.

    In January of 2017 the current Yamaha VXR hull had been in use for two years with good reports. The Yamaha SVHO engine was already regarded as one of the best engines in a PWC, used in the FX and FZR.

    Yamaha announced the new-for-2017 GP1800 SVHO, with a lighter NanXcel 2 hull material and the ‘big’ engine. Seeing the pre-production samples on the floor, they looked good. Sitting on the seat the ergonomics felt good. At the Toronto Boat show in January 2017 we ordered two GP1800 SVHO without having seen one in the water, let alone ridden one.

    Our first ride on the water, we knew we made the right choice. The GP1800 SVHO feels like a modern, upgraded and all around better watercraft. We like the handling, the responsiveness, and the power. *

    We have always ridden standing up with legs flexed. This was mandatory when we were riding flat bottomed early generation hulls that would abuse a seated rider at speed. Standing, we could ride at speed on quite rough water while upper body and head stayed fairly stable. When we bought larger models with more power and speed, but still relatively flat bottomed, riding while seated would be hard on one’s back and neck.


    * Since 2017 Yamaha has upgraded multiple aspects of the GP1800 SVHO, including the ride plate, intake grate, jet pump and some aspects of the engine. A number of the things we upgraded on our 2017 are now included in the 2021 factory product.

  5. #15
    Thanks for all the info, it’s much appreciated and enjoyable to read while looking at the cold dark and dreary outside. Good news, I pulled the trigger on a 2021 GP1800 SVHO, even managed to find one in Ontario. The 91 may or may not be a hassle (I’ll definitely be cruising around and post info on what I find on here when I do in terms of Marinas) but I wouldn’t have it any other way. Started with a waverunner 3, then GP1200, then GP1200R, then GP1300R and sold for kids bedroom set. Kids are older and for my 40th, its time to get back into the game!!!! In the future another ski will be in order for the wife kids but for now I’m thrilled to be able to grab the 1800 SVHO. Do most of my riding in southern Georgian bay (midland and honey harbor area) but this year hope to venture out to the port severn area a little more. If we cross paths at some point that would be great, all the best!!!

    Now for accessories and mods ��

  6. #16
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by pwc_brick View Post
    ... 2021 GP1800 SVHO...

    ... If we cross paths at some point that would be great, all the best!!!

    Now for accessories and mods 😊
    The core upgrades I would suggest would be Solas impeller, Riva Gen 2 intake grate, and the Riva MaptunerX tune kit (with MaptunerX device and one tune licence included).

    Solas impeller has better grip on the water, less cavitation during hard acceleration and better overall.

    Riva Gen 2 intake grate really locks the hull to the water and reports are much better launch thrust, better hull tracking at speed. Top speed may be reduced a tad compared to Riva Gen 1 intake grate. I purchased two of the Gen 2 intake grates, to be installed this spring.

    MaptunerX is convenient and easy to use. Change tunes in a few minutes, select from all tunes for the SVHO engine in GP1800R. I am currently using the Low Octane Stage 1 Plus tune for GP1800 SVHO. Low Octane in Riva terms means 91 octane. The 'normal' Stage 1 Plus tune wants 93 octane.


    When spring arrives, send me a private message on here. Would be happy to meet up and ride. We are familiar with many waterways in the region.

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  8. #17
    Just out of curiosity do you just buy from the greenhulk store and ship north of the border or is there a place up here that you buy from????

  9. #18
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by pwc_brick View Post
    ... buy from the greenhulk store and ship north of the border or is there a place up here that you buy from????
    Mostly from GH store. Support the forum and Jerry offers excellent service should issues arise.

    Support and service matters more than slightly lower prices from elsewhere.

    There is a PWC service shop in GTA that I can recommend. Service, repair and performance upgrades. Well regarded by many PWC racers.

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