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Hot Start Problems - Yamaha 200 2-stroke

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I recently replace my fuel lines (and primer) and installed a fuel/water separator. Afterwards I started having hot start problems. I checked my lines, everything looks good. Changed my spark plugs, battery if fairly new, battery connections look fine...Have no problems running. No problems with cold starts...any help would be greatly appreciated.
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Re: Hot Start Problems - Yamaha 200 2-stroke
You can rule out any battery issues, plugs, etc.

My guess would be the gas line is run too close to a heat source and the line is getting vapor locked. This should not be a mechanical problem if the engine was running fine before the maintenance was performed.

Slim chance that there is a coincidence, but how old is the fuel pump and can you access it easily?
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Re: Hot Start Problems - Yamaha 200 2-stroke
I don't remember if I had the problem before or not, you know how the mind gets.

I also replaced the fuel line in the motor going to the filter with a regular, alcohol resistant fuel line. Is it a special fuel line that's in the motor?

I had one of the lp fuel pumps changed out last year, not sure which one. This model motor (vx200tlrb) has 3. I'm considering changing all 3, doesn't cost much and it wouldn't hurt. The motor smokes a lot when it starts, from reading other posts online lpfp's could cause that.
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Re: Hot Start Problems - Yamaha 200 2-stroke
I had a similar problem with a 2-stroke Yamaha 150. My problem was that the line was pinched inside the engine. It is very easy to do when you change the lines out. I would check that.
The lines should not be different but i am not 100% sure.
If the pump(s) are getting too hot, this will cause a vapor lock, and will explain why it starts fine on a cold start.
I think your problem is either a restricted line, or the fuel line is getting too hot. Both will cause a lock, and both will give you problems on a warm start. Double check that the line is ran internally as the factory had it.
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Re: Hot Start Problems - Yamaha 200 2-stroke
Thanks again for your help.

I did run the new line as the factory had it. I will double-check this morning if there is a pinch. I'll also empty/clean the fuel filter element.

I'm about to order some new LPFP's...like I said they are not that expensive, and even though one has been replaced, I'm sure the other two are overdue.

I will keep you updated. Thanks for taking your time to comment.
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Re: Hot Start Problems - Yamaha 200 2-stroke
I took off the bottom lpfp, squeeze the primer, nothing came out...i pull out the top one, squeezed the primer and gas came out the middle of the back side. Should I replace it?
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Re: Hot Start Problems - Yamaha 200 2-stroke
It's hard to make that call while sitting at a desk, but I'm sure they could use a little Care given their age especially if they are not that expensive.
But this wouldn't really explain the direct problem you have. Warm starts.

If vapor locking is 100% ruled out and the pumps are replaced, I'm not sure what to say.

My next bet would be to disconnect the water fuel separator. They have been known to cause restrictive flow.
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Re: Hot Start Problems - Yamaha 200 2-stroke
I would change the water fuel separator its easy and cheap!!! rickey mite be rite!!!!
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Re: Hot Start Problems - Yamaha 200 2-stroke
Thanks guys. The pumps should arrive today. I'll replace them then make a run.

The water/fuel filter is only a month old, but I will definitely replace it next if the issue is not resolved. I will keep everyone updated. Thanks again for the comments.
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hmmmmm
I wouldn't replace the WFS. I would just bypass it. At least it rules out one thing, and I've heard of that being a problem before.

Weird trick that may work. If you decide to go run it before your pumps come in, bring a bag of ice with you. When the engine starts giving you problems, cool the pumps off with the ice. Leave it on the pumps for just a few minutes. Enough to get the temperature down only a couple of degrees. Once you do that try to start it again. If it starts, then the pump(s) are your issue.

But as of now I'm leaning towards the water fuel separator.
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Re: Hot Start Problems - Yamaha 200 2-stroke
Great news. One of the busted lpfp's had to be the issue. Boat ran great today. No problems with hot starts. The smoking was less too. Hopefully I get a good stretch with no problems.

Thanks again for everyone commenting. I really appreciate your time.
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