Putting together a '94 Yamaha Waverunner III

[borz170]

I am new to jetski's but I am an experienced do it yourself mechanic. I have been given a hull from a '94 Waverunner III and I'm considering purchasing the engine, drive and related parts to make her functional. I need all of the engine, drive and electrical components. The hull still has the cables, fuel tank and motor mounts, gas lines, etc. I would like to make
her run and don't care if it is original with the 701 cc engine, or if it is smaller with a 650, or larger with an 1100. Can anyone give me some insight as to what motors and line up? Will a bigger engine even fit the hull? What Engine and drive components will be universal with what engines? Any help will be greatly appreciated.

 

[dbric36]

Re: Putting together a '94 Yamaha Waverunner III

Will end up costing way more than it is worth

 

[The Penguin]

Re: Putting together a '94 Yamaha Waverunner III

X2

but any yamaha 650/701/760 motor should bolt right in.

 

[rogerwa]

Re: Putting together a '94 Yamaha Waverunner III

Be cheaper to find a donor ski. Find one with a good powerplant but damaged hull or look at multiple damaged units. That to me is the only cost effective may to go about it..

 

[artificialreef]

Re: Putting together a '94 Yamaha Waverunner III

ya man even trying to buy the parts used piecmeal will break the bank. You can find these for 1000$ running. I got mine for 250$, put very few parts into it and am still into it for prob 900$. Find a complete ski running or not. At least all the parts will be there. I think there is a co. selling fresh rebuilt engines for 600$. But yours will need alot more. Get a complete ski. Give yours to someone else. To give you an idea of cost. I needed just a latch and i think it was 50$. Oil pump, 100$. Carb 150$. 1 cable 75$. you need like 4. Start stop switch 150$. Coil 100$ maybe more (cant remember). Temp sensor 75$, Computer. couple of bills. you will be into it for 2500$ by the time your done. And some of those parts will be used so its not a brand new ski.

 

[borz170]

Re: Putting together a '94 Yamaha Waverunner III

Thanks for the replies. Yes, after posting this I went on eBay looking for parts. I found that the parts would be way too expensive. I found a 1991 waverunner III 650 that has the engine out and needs rings for 200$ with a good trailer. Hull looks good and all parts are there. It ran prior to needing ring job. Also, I found a 1993 waverunner III 650 that has a bad hull and no trailer or title for 100$. It ran 3 hrs ago and has sat since. All parts are supposed to be there. I have the hull from a 1994 wr III, so I want to buy both and make at least 1 running ski, if not 2.

Does anybody know the difference between a 650cc and a
701cc? Are they about the same in performance? Should all parts bolt up? Exhaust, drive unit, etc?

 

[The Penguin]

Re: Putting together a '94 Yamaha Waverunner III

bolting up - they are near identical.

you might need a stock exhaust for a 701 (should be able to pick that up cheaply on www.x-h2o.com - place a wanted ad in the WTB forum), carbs are interchangeable if you have a single-carbed 701 motor, but you might need to re-jet the carb from the 650 when you put it on the 701.