Yamaha likes to go sloooowww...

[madgreek]

So, I have a 1996 Yamaha WaveVenture 1100, and it runs fine out of the water, and in the water it idles nicely, but bogs down and stalls if I give it more than a small amount of throttle. At first, it topped out at 6 mph with people on it, and a little higher without them. It takes a while to even get to 6 mph. I have to keep the throttle constant and low, and let off when it starts to bog down, or it stalls. It starts fine if it does, but then it's a slow trip back up to 6 mph lol.I let it run for a bit, and it got a bit better, but not much.

I replaced the fuel filter and ran some sea foam through the carbs, and that helped a lot. But to start off, I need to run it half-choke till about 6-8 mph, then it's fine unless I stop for a minute.

So, what's the problem?

I did a search and didn't find anything related for this model, but similar ones led me to believe that the problem is the carbs. I don't have a manual on the ski, and it's been a long time since I've done any carb work, so I need all the info you can give. If I clean the carbs, what exactly do I need to do, and what do I need to look out for? Same question goes for rebuilding them. What do I need to rebuild? What do I need to be careful about when rebuilding them?

Where is a good place to buy parts?

I haven't had any luck locating a manual too... suggestions?

Thanks!

 

[Johnny1]

My friend has the same waverunner and had the same problem. He rebuilt the carbs and now he uses something called startron that he mixes with the fuel and the thing runs awesome.

 

[madgreek]

That's what I'm thinking. I'm just trying to get through this season...
Could it hurt the engine by running it half-choke?

Where do you think is the best place to buy the rebuild kits?

 

[Dr Honda]

That's what I'm thinking. I'm just trying to get through this season...
Could it hurt the engine by running it half-choke?

Yes... you can destroy the engine. Since the carbs aren't supplying enough fuel... pulling the choke is only band-aid for the problem. If you run a 2-stroke lean... it will melt. Don't run it until you fix the problem.

 

[madgreek]

I'm not quite sure what you mean. When am I running lean? when I pull the choke, I am restricting air, so more fuel is introduced. I'm running rich in that case, right?

I guess you're talking about when I put the choke back in and am running "normally"? So normally, the engine is running lean? That can happen just because the carbs need cleaned?