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Old 12-23-2011, 11:02 PM   #1 (permalink)
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Smile 1993 WaveBlaster / 1989 WaveJammer project

Hi everyone! The end of this summer I picked up a couple waverunners for free! I have helped alot of my friends out with their projects and finally get to do a little work on mine. The skis I'm working on is a 93 Yamaha WaveBlaster with the 701. All I can say about this thing is it has AMAZING handling and acceleration. It needed a little work (rebuild carb, new water box, etc...) but only took a week of wrenching and it was pretty much ready to go. The second ski is an 89 Yamaha WaveJammer with the 500. The Jammer was a complete basket case. There was quite a laundry list for this thing to get going. After hours of time on Ebay and looking at parts diagrams and wrenching, I finally got her up and running. The Jammer is an addicting machine to ride. It is just sooo much fun slipping and sliding all over the water!





I am not going to try to make a hot rod out of the Jammer but I would like to be able to have it hook up a little better and maybe a tiny bit more top end. The jammer runs perfectly and has a Protec extended ride plate ($15 on Ebay!) which helped the handling and time to plain out a little. Any ideas?

As far as the Blaster goes I'm pretty happy with it's performance but any ideas to improve it is appreciated!

I have these skis running great, but this year it's time to improve!

Hope everyone has a great Christmas and New years!
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1993 Yamaha WaveBlaster 701
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Old 01-06-2012, 11:36 PM   #2 (permalink)
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Since it doesn't seem that the weather is going to ever act like winter, I'm thinking it is about time knock the dust off of my summer toys. Toward the end of the season, the Jammer had a couple hick ups. Once in awhile on the later half of a long ride the ski would start to bog down at wide open throttle. If I released the throttle for a split second and then pinned it again the power would return and I could continue riding with any trouble. A couple of times the bog actually led to the ski to stalling. This was not a frequent occurrence but it did happen a couple times. I plan to rebuild the carb and replace the fuel pump diagram. I was also thinking maybe the thermo switch was starting fail. I did remove the hood after it stalled to check the engine was not overheating The motor seemed to be running at a normal temperature. I was just wondering if anyone has had a similar experience with the old Yamaha 500 Waverunners or Jammers. If anyone has any tricks up there sleeves I'd love to here them! Thanks!
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Old 03-06-2012, 09:18 PM   #3 (permalink)
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Hi everyone! Just won a couple of auctions on eBay today! I picked up a new ride plate and intake grate. The ride plate is a brand new R&D extended plate. Only paid $30 shipped! The intake grate is a brand new pro tec open style grate. This will work out perfect because I ride in lakes and rivers which don't have large chop or waves to deal with. For only $12 shipped I couldn't resist! It handles great now, I can't wait to see how it does with the new parts!
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Old 03-10-2012, 03:01 AM   #4 (permalink)
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My Pro Tec intake grate came in today and it looks pretty nice! Especially for only $12!







My new ride plate should arrive in a couple days.

It is getting warm fast, we'll be out on the water again soon!
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Old 03-15-2012, 02:05 AM   #5 (permalink)
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My new ride plate came in today!









I'm pretty excited to see how this combination handles. Hey for a grand total of $42 I really can't lose! Summer is coming!
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Old 03-19-2012, 11:11 PM   #6 (permalink)
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My new intake grate for the Jammer came in today! Maybe it will help get a little more water in the pump!



Hope everyone had a great weekend!
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Old 05-17-2012, 06:50 PM   #7 (permalink)
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Smile Finally got to work!

Well I decided it was time to break the water toys out of hibernation. At the end of last summer the Jammer started to act up and bog after long rides. The Jammer needed a carb rebuild. Last season I was able to get the old 500running pretty good after replaceing the exhaust hoses and spraying they carb down, should have rebuilt it but hey it was running decent and I was content (or lazy ) Well all laziness aside, the old Mikuni BN-38 is sure easy to break down, clean and rebuild. While taking the carb apart I discovered a few obvious reasons for the old ski to run funny. First the diaphrams and gaskets were out of sequence (how it ran I'll nevetr know), and the needle arm was put in backwards!!! WOW, must have been rebuilt on a Monday!

Here is a quick video of the Old Jammer running after it's rebuild. Sure runs great now!


I put in some time on the Blaster, but it pretty just needed new pludgs and a fuel filter and it ran like a champ. I installed the new ride plate and intake grate. Everything went smooth until...SNAP!!! the fourth ride plate snapped off! After a couple hours of Mickey Mouse engineering (and some colorful language!) I finally welded a bolt to the broken bolt and finally got it out!

Here is a quick video of the Blaster running after getting it ready! Enjoy!


Summers coming! Hope everyone has a great weekend!
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Old 05-24-2012, 10:52 PM   #8 (permalink)
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Here is some pictures of my WaverRunners while they were being worked on:

The Old Jammer



Here is one of the main problems for the motor to bog down, the needle arm was installed backwards! I'm amazed it was able to run at all, and not just flood the motor completely!



The Jammers engine compartment after I reinforced the seat tower with some new glass and autobody washers.



New intake grate, I used "the right stuff" silicone, it hasen't failed me yet!

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Old 05-25-2012, 12:38 AM   #9 (permalink)
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A very dirty Blaster after pulling the cover off after a short winter.



New intake grate installed.



The new ride plate finally installed after a couple hours of fighting a broken ride plate bolt Hope it helps the handling!



Ready for the lake!

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Old 06-07-2012, 02:55 AM   #10 (permalink)
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I finally got a chance to put the skis on the water!





Unfortunatly after little less than an hour of riding, the Blaster started to act up. It woud run fine at idle though mid-range, but once I gave it full throttle it would bog and nearly stall. A couple of times I thought I was going to take a swim. After eliminating the temperature switch having problem, an ignition problem, or an actual overheating problem, I decided the fuel pump diaphragm was probably shot. It seemed that the pump was not able to keep up with the demand for fuel and was starving for fuel. Luckily the oil injection works great along with my lightly mixed fuel so the motor wasn't starving for oil. Time for a carb rebuild! I already had a kit so I was ready to go.

Pulling the carb off was easy, but boy were those bolts holding the diaphragm covers tight!!! I had to use a ridiculous amont of force to get those off! A couple of the bolts actually twisted!



Once inside the carb, I found stains from escaping fuel from the diaphragm. The internal fuel filter had some small debris.



The rest of the carb did not look bad. After taking the carb completely apart, I soaked it in carb dip for a couple days.
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