Question about 1979 Yamaha XS 500

1 Answer

My wave runner starts write up an runs good, but after about 20min of running at full throttel it cuts back to half power. it seems like the choks on.I checked it an its off.Checked the plugs an they are fine an burning clean. I don't know what the corect fuel mix should be or the proper gap on the plugs Can this be my problem,. Thanks John

Posted by johngia on

Ad

1 Answer

Angelo Stewart

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Champion:

    An expert who has answered 200 questions.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 224 Answers

Could be the problem. it's an automatic limiter that takes effect when engine starts to heat up. also check your throttle freeplay and that your intake grate is clean. the water s what keeps your engine cool. also the water jackets in your cylinder head could be dirty or partially clogged.

Posted on Jul 09, 2009

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Craftsman chainsaw runs then stalls when starting to cut


allways use full throttel when you insert the chainsaw

Jul 04, 2014 | Husqvarna Garden

1 Answer

Yamaha Wave Runner has gas in oil?


Running too slow for too long can cause this,four strokes like a good run

Aug 16, 2013 | Yamaha Wave Runner GP 800

1 Answer

Acts like it is running out of fuel at quarter tank on guage


pickup in tank sounds like it has a hole in it halfway down

Oct 12, 2012 | 1996 Chevrolet Blazer

1 Answer

What's your problem?1989 nissan truck 2.4L will run for 20min then cuts off and will not crank back. Battery is good but could be a fuel problem


check for spark when it cuts off when its not starting spray starting fluid in the intake that with check for a fuel problem

Sep 26, 2012 | 1997 Nissan Pickup

1 Answer

Gilera runner 125 cuts out as soon as i use the throttel


clean the carb out...make sure you clean the jets!!!

Mar 22, 2010 | 2005 Gilera Runner VX 125

1 Answer

How to start the Stihl BR 320 leaf blower


PRIM IT 3 PUMPS PUT ON FULL CHOCK PULL IT TILL IT TRYES TO START THEN MOVE THE CHOK TO HALF AND IT SHOULD START LET RUN FOR A MINN AND TAKE OFF CHOK

Sep 30, 2009 | Garden

1 Answer

Pulsating Arc


Sounds like one or two of the power diodes are defective (open), producing a half wave pulse instead of full wave, giving it a dotting effect.

Apr 19, 2009 | RTO Esab Handy Plasma 550 W/25' Pt 31XL...

Not finding what you are looking for?
1979 Yamaha XS 500 Logo

211 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

gbob59

Level 3 Expert

3063 Answers

randymanfive

Level 3 Expert

501 Answers

Cindy Wells

Level 3 Expert

6220 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...