The exhaust on jet skis have water nozzles to lower temps in engine compartments. The water will also muffle the sound and affect power. A carb jet can be used in brass fitting.
Try removing your vent tube on the gas tank. Just unplug it for a test run. The motor can demand more gas then what the vent can handle starving the carb for more fuel. All my machines have the tube deleted.
you are smoking that clutch you need to reduce the gear ratio let that engine take some rpm, these 212s don't make much power at engagement speed, that is not 6000 rpm your rpm gauge is set at 4 stroke mode but these spark at every revolution making it read twice of what it actually is. you are choking that engine making it work so hard and burning your clutch up. you could try a torque converter it looks like you have plenty of room for it
I recently acquired a yamaha wave runner 3 jet drive. How did you seal off the impeller shaft and prevent it from leaking? Is it possible to put a sealed bearing into the intake tunnel and seal it off to prevent leaks? I want to keep things as simple as possible.
@@midwesthobbies I found it on CL for $60 usd. Only downside was the one hour drive to pick it up. It is a complete unit with the reverse bucket and brackets. No cables. It all came apart without much difficulty. The impeller is a bit rough, but overall the whole unit is in great shape for a project like this. I will probably replace the impeller and the wear tunnel with a plastic wear tunnel from amazon. To keep cost down I might keep the original impeller until everything gets put together and I know it will work. I plan to use one of the electric start 10hp 186f chinese diesels to power everything. I still need to find an inexpensive jon boat to put it in, but those seem easier to come by than a complete jet drive unit that is inexpensive. And it is more difficult to store a jon boat. Right now I'm just trying to see what others have done and what works best. And I want to rebuild the jet drive with a simple belt drive pulley to get higher RPMs and an idler pulley neutral. Belts seem to be easier and more forgiving with alignments. I would like to avoid clutches or other expensive systems that are more wearable and consumable.
I subscribed. If you are reading this, you should too. It looks good. I was going to comment that a tach would be your best friend.... then I saw the wire at 6:30, 6000 rpm should be plenty 🤔. Boat moves along. A 420 would be interesting.
You need to either run the test in both directions and average, or just see how fast your drift is and deduct that from your speed. it looks like you have at least a 3mph current.
Can also buy and build we run them on racing carts me and a buddy just got don't building a 20+hp 225cc a 263cc would be 30+ done right which would ripppp on that boat
The exhaust on jet skis have water nozzles to lower temps in engine compartments. The water will also muffle the sound and affect power. A carb jet can be used in brass fitting.
Bear: "I demand you let me in the boat!" 🤣
Love the idea of boat light enough to be hauled up the bank by one guy and can get up the creek with a little speed
Try removing your vent tube on the gas tank. Just unplug it for a test run. The motor can demand more gas then what the vent can handle starving the carb for more fuel. All my machines have the tube deleted.
Have you read you plug and tune the carb
Could be leaving some on the table
Upgrade to a 24 mm nibbi carb and 26 lb valve springs.
you are smoking that clutch you need to reduce the gear ratio let that engine take some rpm, these 212s don't make much power at engagement speed, that is not 6000 rpm your rpm gauge is set at 4 stroke mode but these spark at every revolution making it read twice of what it actually is. you are choking that engine making it work so hard and burning your clutch up. you could try a torque converter it looks like you have plenty of room for it
What model and year ski did the pump come from? Freaking sweet dude
1989 Yamaha 500
Are you still working on this project, and are more videos in the works? Very curious
@@xXmrhockey10Xx yes doing more engine mods
Not sure exactly what is done but upgraded valve springs and a billet flywheel might make a decent difference
@@maintenancemonkeys8239 I did billet flywheel, rod, 26 lb valve spring
I need a a gear for my pump shaft. I cant find anything that even comes close to working. Where did you get yours?
@@thatguyfishingben4794 Amazon.
Put smaller sprocket on the propeller side
Add an electric turbo
I recently acquired a yamaha wave runner 3 jet drive. How did you seal off the impeller shaft and prevent it from leaking? Is it possible to put a sealed bearing into the intake tunnel and seal it off to prevent leaks? I want to keep things as simple as possible.
@@williamzupancic3959yes it should have a sealed bearing, did you get it off eBay?
@@midwesthobbies I found it on CL for $60 usd. Only downside was the one hour drive to pick it up. It is a complete unit with the reverse bucket and brackets. No cables. It all came apart without much difficulty. The impeller is a bit rough, but overall the whole unit is in great shape for a project like this. I will probably replace the impeller and the wear tunnel with a plastic wear tunnel from amazon. To keep cost down I might keep the original impeller until everything gets put together and I know it will work. I plan to use one of the electric start 10hp 186f chinese diesels to power everything. I still need to find an inexpensive jon boat to put it in, but those seem easier to come by than a complete jet drive unit that is inexpensive. And it is more difficult to store a jon boat.
Right now I'm just trying to see what others have done and what works best. And I want to rebuild the jet drive with a simple belt drive pulley to get higher RPMs and an idler pulley neutral. Belts seem to be easier and more forgiving with alignments. I would like to avoid clutches or other expensive systems that are more wearable and consumable.
@@williamzupancic3959 please keep me updated!
I subscribed. If you are reading this, you should too. It looks good. I was going to comment that a tach would be your best friend.... then I saw the wire at 6:30, 6000 rpm should be plenty 🤔. Boat moves along. A 420 would be interesting.
@@TSRGarage I think my next build will be a 420
I'm thinking 125 yamaha 2 stroke
Seems plenty fast for your river!
18 MPH after changing gearing
Would you just let the dog ride in the boat already?😂
You need to either run the test in both directions and average, or just see how fast your drift is and deduct that from your speed. it looks like you have at least a 3mph current.
@@dwcheshire thanks I will do that
Let's see a Tillotson 3inch 263cc motor
Can also buy and build we run them on racing carts me and a buddy just got don't building a 20+hp 225cc a 263cc would be 30+ done right which would ripppp on that boat
What jet pump are you using and how did you mount the pulley on the end of it?
@@adamlines6368 Yamaha 500, tap and drill pulley
Where did you get the jet drive from, and what would be the costs of the jet drive itself? (and up to how many HP is the jet drive rated for?)
@@Jahee-Official it’s a Yamaha 500 jet pump. Rated for 50 hp
Looks like a stand up jet ski head to me.
@@midwesthobbies Thanks for the info! I'll start browsing e-bay.