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Fixing a Craftsman 25cc Handheld Blower [Bad Ignition Coil, Loose Cylinder Head Bolts]

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This video troubleshoots a Craftsman 25cc Gas Blower, model 358.794700, that was found on the side of the road and would not start. It was discovered that the ignition coil, or magneto, was faulty and needed to be replaced. Additional troubleshooting found that the cylinder head bolts sealing the Cylinder to the Crankcase were loose which was affecting engine compression and preventing the engine from starting.
Ignition Coil amzn.to/3tMMIKQ (Amazon Affiliate Link)
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Disclosure: This RU-vid video is provided for informational purposes only. If you choose to try one of the suggestions made in this video, you do so at your own risk. Please ensure that you take all proper safety measures before attempting any project. As an Amazon Associate I earn from qualifying purchases (at the links above), however this video is not endorsed by any company, nor have I received any of the featured products as promotional items. I'm just an ordinary DIY'er sharing my experiences.

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22 авг 2024

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Комментарии : 119

@Aviandenim 2 года назад

I have a unit exactly like this. The knowledge and detail of the repair person is so comprehensive and complete. He tackles, explains and repairs every aspect of this very handy tool including carburetor adjustments.

@BlackHoleDIY 2 года назад

Thank you for leaving this comment, Aviandenim. I really appreciate the feedback.

@retiredhappy466 Год назад

Just got one of these from my neighbor's trash. Looking forward to getting ot running. Thanks for the very detailed troubleshooting video. It was very well put together.

@burtburt1755 2 года назад

Been working on one like this for hours. Good spark, compression. and good fuel lines and fuel. Flywheel is in proper order. After seeing the patients you put into yours I'm going back out and check the cylinder bolts. Never thought to check them. Thank you for sticking with this one and making it run.

@BlackHoleDIY 2 года назад

Hi Burt. Any luck? Would love to hear what your solution was if able to fix it. Thanks!

@burtburt1755 2 года назад

@@BlackHoleDIY I would love to say that I fixed it. Put new coil and carb and never got it to hit much less run. I even hooked a drill to spin it over. 130 Lbs of compression and I also cleaned the exhaust port. I'm going to finish some other projects and then get back on this one.

@BlackHoleDIY 2 года назад

Thanks for the update! Great to hear you haven't given up hope.

@justsaying4195 Год назад

Seeing the oil on top of the gas tank I had a feeling that the cylinder came loose from the body been there done that, now I'm doing it again because I purchased some blue loctite

@warrensoutdoors5964 Год назад

Mine won't start, has great spark, getting good fuel, iffy compression (50psi) but won't start

@MikeySmithJones 2 года назад

Just found one on the side of the road yesterday. Can't wait to get into it this weekend and get it running. Thanks for the video, gonna help me bigly.

@BlackHoleDIY 2 года назад

Nice, Nolan! I hope you're successful in bringing it back to life!

@eddystillman8671 2 года назад

Thanks for taking the time to make this video. Multiple obstacles but definitely showed it’s all about troubleshooting.

@BlackHoleDIY 2 года назад

Thank you, Eddy. You're right. I really enjoy the troubleshooting element of these projects.

@howardpaul7614 3 года назад

Great video! My leaf blower is dead, no spark. So, I ordered a new ignition coil for delivery next week. Fingers crossed for the same success as yours. Hope I can keep as patient as you.

@BlackHoleDIY 3 года назад

Thanks, Howard! Let me know how it turns out.

@jerrudmikolaiczik7004 3 года назад

I fixed a free one just like this. It had a stuck ring, removed the ring and cleaned it, and it works great.

@BlackHoleDIY 3 года назад

That's great! Way to go, Jerrud!

@dezwilliamz 3 года назад

Good video. Plenty of detail and troubleshooting. Glad you stayed on course and didn't give up on it. Less things in the landfill! 👍

@BlackHoleDIY 3 года назад

Thank you, dezwilliamz!

@derekhaywood1844 2 года назад

This dude rocks… Brother I truly appreciate all that work you put into that.

@BlackHoleDIY 2 года назад

Thank you, Derek! I really appreciate it.

@derekhaywood1844 2 года назад

@@BlackHoleDIY Brother , I fix thing’s as well , I have a shop. You definitely have the ability too fix thing’s. You are awesome brother and the way you continued to troubleshoot it until you got it running , I have great respect for you. Good stuff brother and keep on rocking. Have a great , blessed , day !!!

@woodsruralguy4317 3 года назад

Persistence pays off! I have to replace the starter rope so I picked up a few pointers.

@user-hk8uq8tz9djose 6 месяцев назад

Wooo precisamente mi padre me regaló uno igual y ayer traté de encenderlo y no pude este video me ayudar de mucho excelente video 👍🏼

@BlackHoleDIY 6 месяцев назад

Thank you!

@MrCoffeeMrRadar Год назад

Thank you for this video, I have the exact one and it's giving the same type of issue so I'm going watch this a couple more times.

@BlackHoleDIY Год назад

You're welcome. Good luck on the repair!

@timgoeller6900 3 года назад

Great video! I have one I can't start after replacing the fuel lines which had rotted away, so this shows me exactly what to do next. Thanks!

@BlackHoleDIY 3 года назад

Thanks, Tim! Let us know how it turns out.

@andrewturke7748 3 года назад

Hey Tim, I have the same model that will not start after replacing rotten fuel lines as well. Just curious if and how your were able to get yours to start?

@timgoeller6900 3 года назад

@@andrewturke7748 Hi Andrew, all I did was replace the fuel lines and it did start. However, it will not idle correctly so I think I have to take the carb apart and clean it thoroughly. Good luck with yours!

@andrewturke7748 3 года назад

@@timgoeller6900 Thanks for the tips! took apart and cleaned my carb, cleaned the spark plug and put some fuel in the cylinder head and it started right up. Runs great now and ready for fall.

@rogervancleave8670 2 года назад

Good video! Now to see if I can get mine running again.

@BlackHoleDIY 2 года назад

Thanks, Roger. Good luck!

@internetlocalcom 2 года назад

Good video, man. Appreciate it. I don't think I am getting spark. With what you showed me, maybe I will tinker with it. My spark plug is a CJ8 so maybe my model is different. Thanks a bunch.

@BlackHoleDIY 2 года назад

Thank you, John. I really appreciate this feedback. Good luck with the repair!

@Hawk013 Год назад

Just had one of these come by, loose cylinder head bolt. Sucked the gasket in and ate it. I'd have saved like 4 hours of banging my head against the wall if I'd found this video first lol.

@BlackHoleDIY Год назад

@Hawk013, thanks for the comment. I feel your pain. Took me a while to figure this one out.

@pumpkinpeanut1 3 года назад

Tks for such a great video. My Husqvarna has the same symptoms as your Craftsman! I'm going to check the cylinder head screws on mine. Maybe That's why it won

@BlackHoleDIY 3 года назад

Thanks, John! I hope you're able to identify the fix for your husqvarna.

@adoniscarter74 2 года назад

Great job getting it to run thank my have the same problem

@BlackHoleDIY 2 года назад

Thanks, Adonis. I hope you're able to get yours running as well.

@attheendoftheday8969 3 года назад

Great vid! Got the same blower for 10 bucks that won't start. Got new everything, cleaned everything. Spark is good. Idk about compression though. About to check head bolts and let you know if it worked Edit: Craftsman leaf blower for sale. $10

@BlackHoleDIY 3 года назад

Ah man, bummer! Sorry to hear that. Will it run if you remove the plug, put a little bit of fuel/oil mix directly in the cylinder, reinstall plug, and try to start? I'm curious if the limitation is at the carburetor.

@attheendoftheday8969 3 года назад

@@BlackHoleDIY i haven't tried it with fuel mixture, only starting fluid at the plug. Would it be better with the fuel instead? It would start and run but die out in less than 20 sec typically. But then not start afterwards.

@BlackHoleDIY 3 года назад

No, the fuel won't get you much now hearing that it does run for a short period of time. Sounds to me like an issue with the carburetor (even though you've cleaned it). If you're willing to put any more money into it, I'd try picking up one of the cheap chinese knockoff carbs and giving it a try. Also, the fact that it's running for a bit than dying... will it run with the gas cap off/loose? I wonder if the gas cap is not venting properly.

@attheendoftheday8969 3 года назад

@@BlackHoleDIY I was going to go ahead and order a carb. I haven't tried it without the gas cap off/loose yet but I will try it tomorrow and see. That might be it

@attheendoftheday8969 3 года назад

@@BlackHoleDIY gave it another whirl with direct fuel and no gas cap but no luck. Starting to get blisters on both hands so I give up for now lol

@foltz-art 2 года назад

Awesomeness at work 🙌

@BlackHoleDIY 2 года назад

Thank you, Foltz Art!

@vernonmartin4327 9 месяцев назад

Thank u for this vide & info

@BlackHoleDIY 9 месяцев назад

You're welcome. Glad it was helpful!

@w1swh1 Год назад

Excellent, thanks. My Craftsman blower (same model) stopped working and I found that one of the fuel lines (with the filter) had broken. Easy fix but why are there two tubes going to the fuel tank? I will also be taking the blower apart and giving it a good clean. I will also check cylinder bolts. Like you I am just a guy with a few tools although I've been fixing things all my life as a hobby :)

@BlackHoleDIY Год назад

Hi Derrick. I really appreciate the comment and question. One fuel line is the pickup and the second is the return to the tank.

@w1swh1 Год назад

@@BlackHoleDIY Thank you for all the tips🙂

@tomcooper748 2 года назад

Great information and good presentation. I've been looking for a quick painless way to clean outside dirt and grime away, at 0:53 that machine looks terrific, how did you do it and what did you use? Thanks

@BlackHoleDIY 2 года назад

Hi Tom. Thanks for the comment. My go-to is Meguiar's All Purpose Cleaner concentrate. I have two mixes on hand, 10:1 and 4:1. The 4:1 is the "heavy duty" cleaning ratio and what I used to clean the blower (with some shop towels, toothbrush for crevices, and good old elbow grease). The 10:1 is great for car interiors and other light cleaning.

@raybash4852 2 года назад

Awesome job- I think my cylinder heads are loose

@johnslawncaretips4103 3 года назад

Always check the gap before installing the spark plug.

@BlackHoleDIY 3 года назад

This is a great tip. Thanks, John!

@seanmcgillicuddy956 2 года назад

Funny I should find your great video .. I was given the same blower ..Now to do the trouble shooting ..Thanks

@BlackHoleDIY 2 года назад

Thank you, Sean! I hope you are successful in repairing your blower.

@seanmcgillicuddy956 2 года назад

@@BlackHoleDIY I'll keep you updated.

@MJAli-lf5ms 2 месяца назад

Where does the round thing go for the ground that comes off of the switch? I can’t find a place to ground it out

@BlackHoleDIY 2 месяца назад

Install the ring terminal on the upper screw that secures the coil. Ring terminal goes just behind the screw head. Hope this helps!

@paulkonczak5270 3 года назад

I had the exact blower and it had no spark, the coil to flywheel gap was too wide I loosened the retaining bolts then gaped and it got spark and is running for years now.

@craigcarrillo 3 года назад

I have the same blower and feel it's either my coil and/or gap and possibly the kill switch harness which showed resistance down to the coil with the switch disconnected.

@TM-hk3ic Год назад

Great Video! I have the identical machine. What size are the head bolts? Thank You

@BlackHoleDIY Год назад

You can use a 3/16" hex key, or a T27 torx driver will work.

@TM-hk3ic Год назад

@@BlackHoleDIY Thank you. I ended up using a 4.5 Metric Allen head on mine

@BlackHoleDIY Год назад

You're welcome, TM. Happy to help.

@garyclarke1340 Год назад

When you have two lines into tank and they are different in size and they were rotted off and didn't notice where the pick up filter goes, was it on the small line to carb.

@BlackHoleDIY Год назад

The fuel filter will go on the line furthest from the purge bulb. The line closest to the purge bulb is the return line back to the tank.

@garyclarke1340 Год назад

Put pick up filter on the small tube after a struggle and It fired up. Waiting on some special tools for carb adjustment now to get out of the 4 stroke mode. You were a major help. Blessings.

@BlackHoleDIY Год назад

That's great news, Gary! Glad I could help.

@AndersonKoitiMatsuo 3 года назад

Great job!

@BlackHoleDIY 3 года назад

Thank you!

@777syndrome 2 года назад

My bolts also came loose, you likely need a new o ring or it will keep leaking oil.

@heathwilson2572 Год назад

BlackHole DIY the gas is old and dirty I use 91 octane premium unleaded non ethanol gas in all my equipment. Ethanol is not good for the carburetor

@BlackHoleDIY Год назад

Yep, I too only run non ethanol in all my equipment. I'm fortunate to have easy access to 93 octane.

@mikemiller7231 Год назад

I think it was just your switch you didn’t have your ground ground. Of course you hooked it up when you put things together and then it worked.. the big difference was you grounded the ground. You didn’t even check the primary and secondary coil with ground. Still pretty sure it was just the switch. Just a tip!

@BlackHoleDIY Год назад

Thanks for the comment, Mike. I always appreciate others sharing their own experiences and knowledge.

@09sheerios 3 года назад

Leaf blower was given to me but pull cord did not retract all the way. I could still pull enough to start blower. I then opened it up to see what the issue was. After putting back together it does not start anymore. If I put the blower sideways, would this have caused some issues?

@BlackHoleDIY 3 года назад

Hi Sheerios. Placing the blower on its side is ok. When you opened it up did you only take off the casing to access the pull cord recoil assembly or did you remove additional engine components? Is the recoil engaging when you pull the cord now (i.e. engine turns)?

@garyclarke1340 Год назад

Is the fuel filter on the small tube in tank?

@BlackHoleDIY Год назад

Hi Gary. Yes, there is a fuel filter at the end of the pick up line inside the fuel tank.

@godsforces1776 Год назад

I have the same Blower , the problem of mine is I can't start after each use . I have to leave it about a hour or two before I can restart again ... Can you help me on that ?

@BlackHoleDIY Год назад

I would start with the spark plug. Has it been replaced lately?

@edbrzuszkiewicz249 Год назад

Thanks

@BlackHoleDIY Год назад

You're welcome. Thanks for the comment, Ed.

@alaindelice6552 3 года назад

Can you send the link for the ignition coil

@BlackHoleDIY 3 года назад

Sure, Alain. The ignition coil I purchased was this one amzn.to/2OWdlwG.

@alaindelice6552 3 года назад

Thanks for your detailed video, I really learned a lot from it

@BlackHoleDIY 3 года назад

You're welcome! I'm glad it was helpful.

@AlvaroGarcia-kf3ih 3 года назад

New carburetor has spark but won’t run I need help same leaf blower

@BlackHoleDIY 3 года назад

Alvaro, will it run if starting fluid is used? Or, you can pour a very little amount of fuel/oil mixture directly into the cylinder through the spark plug hole. Reinstall the plug and cable and see if it will start. If it does, this will isolate the problem to a fuel delivery issue.

@boreed5734 2 года назад

Ordered new ignition coil installed it still no spark any ideas?

@BlackHoleDIY 2 года назад

Bo, I'll assume the method you're using to check spark is with the spark plug attached and grounding it to the engine, and that the spark plug is good. Is there a chance you received a bad coil? There are some videos online showing how to check the ignition coil using an ohmmeter to get an idea if it is good. Also, be sure your gap between the ignition coil and flywheel is about the thickness of a business card.

@boreed5734 2 года назад

@@BlackHoleDIY I considered I might have received a bad coil, and I properly gapped it ... I'll order a new coil and start over

@steveobee3488 Год назад

My last 3 didgets are 731 looks just like the one i found

@scotthamm7786 3 года назад

I did ALL of this, still nothing. New plug, new gas, completely disassembled and cleaned carb, new coil, double checked coil gap, blew out spark arrestor, head bolts are tight. NOTHING!

@BlackHoleDIY 3 года назад

Hi Scott. Will it run if starting fluid is sprayed inside the carburetor?

@paulkonczak5270 3 года назад

He forgot to disconnect the kill switch wires.

@nassibelhassani4075 3 года назад

i bought a new one like this. it wont start

@joelpritchard451 3 года назад

I would use 50 2 1 not 40

@BlackHoleDIY 3 года назад

I think you'd be fine running 50:1. The fuel cap on this particular blower states 40:1.

@catdakman1273 2 года назад

I have been gaping new spark plugs All my life..... Aprox: 40% are NOT GAPED CORECT !!!!!!!!!! Note: !!! GAP THE NEW PLUG !!!!!!!!!!!

@BlackHoleDIY 2 года назад

I completely agree, Cat! I recently purchased new plugs for my car and boat engine. Both sets had plugs that were not gapped correctly. Since then I check every plug before putting it in an engine. This is great advice! Thank you for the comment.