2 stoke hole borer, siezed! overheated?

kramdra · World Chat Champion Joined: 28 Oct 2010 Karma :

Been digging some holes. Using this www.ebay.co.uk/itm/262719926631 Its my first time with 2T and Ive broke it, though it did dig many holes. Looking down the intake and exhaust it has quite a bit of scoring, is this serivicable or fatal? I gave it a good squirt of 4T oil and a wiggle of the rotor free'd it up. I need to make 3 more big holes this week and then a couple weeks before I do any more. Can I continue using it, it now turns over smoothly but I did not try starting. Or should I ebay a new piston/barrel kit to avoid damaging the crank, other bits?

Using 25:1 mix (500ml petrol : 20ml 2T oil) It did not like running without choke so kept it between 3/4 - fully on. Dug several 4" holes in quick sucsession, full throttle for about 5 minutes, we hit some hard ground that it was struggling to break up. Suddenly it slowed and cut out, I gave the pull start a tug, moved a turn then seized. Overheated? I did not let it run any significant time without throttle - I know that means no oil, so avoided.

Bloody awesome tool. Hard clay ground that spade wont touch, this puts an 200mm wide x 900mm deep hole in a couple seconds, but I have a large bruise on my leg.. Embarassed

Tankie · Crazy Courier Joined: 24 Feb 2017 Karma :

He He love it! 25 to 1 a bit too much oil I think.
This afternoon I got pulled for making too much smoke...... on a H1
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kramdra · World Chat Champion Joined: 28 Oct 2010 Karma :

Thats what the destructions say. Whole litre bottle of oil to use up. Safer to use too much?

Tankie · Crazy Courier Joined: 24 Feb 2017 Karma :

No , cos too much oil means a lean mixture which = seize
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- · Super Spammer Joined: 22 Oct 2013 Karma :

kramdra · World Chat Champion Joined: 28 Oct 2010 Karma :

The oil is a blue colour and became evenly distributed instantly, gave it a good shake but only put half of my 500ml mix into the tank.

Its had one 520ml tank, siezed after 100ml of second tank.

alains · World Chat Champion Joined: 08 Jul 2004 Karma :

the seizure comes after a lean mixture at high rpm (2 strokes)
you may have a screw to adjust air . very rarely by lack of oïl
if you can make the engine turning (take of sparkplug) , Nothing fatal if you've got compression (test it)
dont use mixed petrol , fill the 2 strokes oïl tank
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kramdra · World Chat Champion Joined: 28 Oct 2010 Karma :

She runs! Got a couple pics from the exhaust port.

https://s1.postimg.org/444abruui7/IMG_20171010_194343.jpg
https://s1.postimg.org/3uwi3b3xpr/IMG_20171010_200640.jpg

Polarbear · Super Spammer Joined: 24 Feb 2007 Karma :

It does look a bit scruffy Laughing

Are pistons, rings and barrels readily available or will it just be cheaper to by a new one and use your old one as spares?
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kramdra · World Chat Champion Joined: 28 Oct 2010 Karma :

Yes. Parts are available and cheap but I wont know what fits until I strip it, which can wait until dead.. was hoping someone might know these engines?

The tool cost 117 and a whole replacement engine is 60. I will be happy to buy another if needed, when it works, it works very, very well.

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

Assuming it was new, send it back. You used it according to the instructions, and it broke after one tank of fuel.

Either the engine was assembled wrong, or there's a problem on the intake side giving a very lean mixture. At £117 new, it isn't going to use high quality parts of have rigorous quality control.