| Attaching a lawnmower blade to a crankshaft without using a blade adaptor?? | |
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MatthewD Veteran Member
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![Attaching a lawnmower blade to a crankshaft without using a blade adaptor?? Empty](https://2img.net/i/empty.gif) | Subject: Attaching a lawnmower blade to a crankshaft without using a blade adaptor?? January 21st 2015, 12:28 pm | |
| Hi,
About 3 months ago, I went to a local lawnmower center and bought a 3.75hp Briggs flat head for 15 quid. My plan for it was to attach it to an old lawnmower deck I have and mow the lawn. However, The blade adaptor that came with the engine is too tall for the deck so the blade sticks out too far. How could I attach the blade without using the blade adaptor? | |
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![Attaching a lawnmower blade to a crankshaft without using a blade adaptor?? Empty](https://2img.net/i/empty.gif) | Subject: Re: Attaching a lawnmower blade to a crankshaft without using a blade adaptor?? January 22nd 2015, 6:04 pm | |
| I personally, was never keen on engine spacers. Increases the shear loading on the bolts (by a large margin), and can result in failure. Other failures can include breaking the mounting flange on the engine. I'm not saying it WILL, I'm saying it CAN.
Is anything stopping you from shortening the adaptor??? | |
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redlinemotorsportts Moderator
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MatthewD Veteran Member
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![Attaching a lawnmower blade to a crankshaft without using a blade adaptor?? Empty](https://2img.net/i/empty.gif) | Subject: Re: Attaching a lawnmower blade to a crankshaft without using a blade adaptor?? January 23rd 2015, 1:40 pm | |
| - Doc Sprocket wrote:
- I personally, was never keen on engine spacers. Increases the shear loading on the bolts (by a large margin), and can result in failure. Other failures can include breaking the mounting flange on the engine. I'm not saying it WILL, I'm saying it CAN.
Is anything stopping you from shortening the adaptor??? Right okay thanks for the info Doc! I`ve tried doing that but it doesn`t really work. I`ve tried researching to see if I could buy one and there doesn`t seem to be any different ones. - redlinemotorsportts wrote:
- Doc has a good point. Very valid. On my speed mower i raised the engine with 1x1" boxed pieces with a hole drilled and welded to the engine plate. IMO, acts just the same as a engine plate and mounts should not snap off or anything. Id do it this way, def not stacking washers or that ghetto stuff.
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![Attaching a lawnmower blade to a crankshaft without using a blade adaptor?? 10259810](https://i.servimg.com/u/f38/18/18/82/33/10259810.jpg) Yes but the only problem with that is that the mower deck is Cast Aluminum and you can`t weld anything to it. | |
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MatthewD Veteran Member
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