Hi folks I'm new kid on the block here and have bought an old and seeminly tired Greenfield with a 12HP B&S I/C motor. These types of engines are new to me. My experience is more motorbikes and car engines. Of recent times I have started to play with two strokes.
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I bought it off a fella a week ago and suspiciously it was warm when I got there. Today after starting it for the first time ( I rewired the electrics and picked up new air cleaner, oil change etc) it ran pretty badly. It fired up fine but blew a puff of smoke accompanied by a cyclic run fine for 3 seconds, slow down then pick up again which on the rev up would blow the puff of smoke. It did this the entire time but got much better when it was warm. Once warm the cyclic stutter was far less noticable but would still blow a puff of smoke. When the idle was fine (between the stutter) the motor blew no smoke and idled fine.
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In the above picture, the mechanism infront of the fuel tap which has the spring loaded screw rotates in sync with idle pattern. Is this some type of govenor?

During the week I will remove the carb, clean and replace parts. Due to the price of parts (needle and seat and two gaskets for my 5.5I/C cost me $50 last week!!) I was not wanting to spend too much on a very tired motor and put it (money) toward a replacement.

If anyone has any advice on what to check before I spend dollars I'm all ears.

Thanks

Edit Model 281707 Type 0137-01 Code 88060311

Last edited by grumpy; 04/01/11 02:20 AM. Reason: Localise images