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XR1800 4-Stroke MR1 Swap

Robb235

Jet Boat Addict
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Year
2000
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cool... I just pulled the pump off my donor jet ski (2006 FX HO Cruiser) if you want any of the trim/steering/nozzle parts i can send them to you... Im only interested in the shaft, impeller and stator housing.
I think I'm good, I think I pulled everything needed off of my donor skis.

@2kwik4u would probably be interested. He was asking me in another thread if I was interested in parting with the parts I pulled of my donor ski.
 

2kwik4u

Jetboaters Admiral
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Year
2017
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84rzv500r

Jetboaters Commander
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these parts are all off a 2006 FX Cruiser HO anniversary edition... if they will work for you, pay for the shipping and they're yours.. im keeping the shaft, stator housing and impeller and the rest is up for grabs... I'll start a thread in the WTB/WTS area when I get ready...
 

Hoppy

Active Member
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The big thing stopping me from adapting the trim system onto my boat has been how do I actually control the trim? I've been trying to brainstorm ideas, everything from some sort of locking shift lever, to electric motors to control the trim ring of the nozzles.

The jet skis used the QSTS or "quick shift trim system" if I recall. You pull a "trigger" then set the trim by twisting the left handle bar, similar to how you twist the throttle. Releasing the trigger locks the trim in place, either -10, -5, 0, +5, or +10 degrees of nozzle angle. I don't have handle bars, so adapting the QSTS doesn't appear to be an option.

There's another thread on here where I believe the guy used a trim tab actuator to control the the trim of the nozzles. I think he had the actuators in hand already, so it didn't cost him anything to use them to control the nozzle trim. I'm not sure how much effect trimming the nozzles will have on the XR1800, so I'm looking to keep this conversion low budget. Trim tab actuators are a little pricier than what I want to spend.

After doing some research, I learned that some Seadoo boats came with what's called Variable Trim System, or VTS. It looks like an electric motor either pulls or pushes on the trim ring in the nozzle. It might seem a bit taboo to use Seadoo parts on a Yamaha, but I think adapting their electric trim motor might be the best option to controlling the trim system adapted to a jet boat.

Certainly open to any ideas if anyone has any.

View attachment 185591View attachment 185592View attachment 185593View attachment 185594
The seadoo VTS was not very reliable atlest the early ones the reed switches on the control board that is mounted to the motor housing failed frequently causing the motor and or the gauge to not work. It would be a good idea to make sure the one you have works properly. I had to fix the system on my 95 seadoo xp I made a writeup here https://www.seadooforum.com/threads/vts-mod.65772/ There is an aftermarket fix that is buy able called the trim fix I don't know much about it but here is the link https://www.thetrimfix.com/
 
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