How To Fix A Generator With No Compression That Won't Start

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2019-10-24に共有

Generator won't start and has no compression?
Watch this video to see how I repair this compression problem without replacing any parts!

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コメント (21)

@ezelk1337 4年前

I went through everything on a Kohler propane generator with 30 psi compression. It only had about 20 hours of use on it total. I finally checked the valves and they both had zero play. I set them just like you did and it started right up! You are helping out a lot of people with your videos. Subscribed .Thank you
@danielswink8348 1年前

Thank-you, Don! My DuroStar generator is 7 years old with only about 100 hours on it. On 12-23 the power went out. It was about 5 degrees and my generator absolutely would not start. : / All it did was backfire once about every 15 pulls. I researched for weeks, tried new oil, new gas, new spark plug, clean air filter, low oil sensor disconnect, starter fluid and even a new carburetor with no effect at all. Then I found your video. I got a set of feeler gages, I adjusted the valve clearance and about 20 minutes later my generator started on the very first pull and it runs great! 🙂
@chrisvill54 2年前

With YouTube you can fix anything. I was having no compression on a predator generator. Took the valve cover off and realized both valves had no gap at all when at top dead center. Adjusted them and that fixed the problem. Thanks for the video. Very helpful.
@1hjehje 4年前

I didn't think that the valve adjustment would change that much over time. An excellent video .. Thank You!
@eosjoe565 4年前

I always re-check the gap after tightening the lock nut as 9 times out of 10 it changes the gap slightly. I normally have to compensate by leaving the gap a couple thousands loose prior to tightening the nut. Then when the nut is tightened the gap is right where I want it.
@MRrwmac 4年前

Didn’t know that was as much of a problem on new machines! I would have thought a head gasket. Thanks for the tip!
@barrybebenek8691 4年前

Weird that these things have the clearances change so easily. 🤷🏻‍♂️ Thanks for another easy fix. 🇨🇦👍🏼
@davidhiggins8505 5ヶ月前

Thank You! ❤ Our Ryobi generator had a very similar problem(stuck valve). And, your video and expertise helped me fix the gen, and avoid a long drive and hassle. Great information, well delivered.
@piratekiller13 5ヶ月前

Did exactly what you said after buying the feeler gauge and I’ll be dernd if it didn’t start first pull! Thanks for the video and easy to understand instructions!
@rstephe 4年前

Wow! Glad I am subscribed to learn this one. Never even knew this was an issue. Had valves back out before but never tighten to keep open. Thanks for sharing.
@herbertsjeffrey 3年前

Super clear. I enjoyed learning from the cause to solution. Great teacher!
@Dave7160 3年前

Hi Donyboy73, I just wanted to tell you personally that I have tried everything to get my generator to work and it wouldn't then I saw your video about the valve adjustment and It was the exhaust valve that needed adjustment I did the adjustment of 004, 102mm and put it back together and the generator fired right up on the first pull, it was thanks to your video, you should be nominated for an Emmy award for all the help you give people in getting their equipment running, thank you much for all your help please keep up the great work big thumbs 👍to you sir.
@bobfrey6953 1年前

Have a Smarter Tools 7500 W dual fuel generator that I use at our off grid cabin. It was becoming increasingly harder to start and finally would not start. Checked the compression - ZERO! Saw this video and checked my valves (just like yours, the intake was loose, the exhaust was tight). Adjusted both to .004", put the valve cover back on and wouldn't you know it - started RIGHT up! Thanks!
@robkenna2795 4年前

Thanks enjoy your videos, and usually learn something new. You are the type of mechanic everyone would hope to know. Good stuff.
@scottfirman 4年前

I always check the valves on any OHV engine that has starting issues after checking the carb. As you said, no compression is the biggest give away on those engines. Especially riding mowers in really good condition. I also pull the plugs first thing. An oil soaked spark plug means bad news. After seeing a no oil plug, I know then its just valves. I have had stuck valves on older generator too. A poorly maintained generator is just asking for trouble.
@josephpuchel6497 4年前

Hey I have found quite a few of these particular engines having to adjust valves. Excellent video Donyboy
@papajon6715 4年前

You are offerring a great public service. I want to know who the six people are that dislike this video, are they just 'professional malcontents'?
@RayTuttiver 1年前

i have 6 generators and 4 of them would not run...but since watching this video now they all run great thanks a million
@skipproctor8979 4年前

Engine won't start, no compression. Automatic valve job. Thanks Don.
@sailme2day 4年前

Thank you Don , your skills and honesty is appreciated .