View single post by Esprit2
 Posted: 06-17-2015 08:01 pm
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Joined: 05-01-2005
Location: Minneapolis, Minnesota USA
Posts: 512
subwoofer wrote:
3. Stale fuel. Fuel is from last year, but it did the same thing last year when the fuel was fresh. Also, expected outcome of stale fuel is hard starting and poor idle, especially when cold. Neither seems to be true.Do you have oxygenate fuel in Norway? Ethanol in the fuel? Oxygenated fuel goes bad very quickly. 2.5 to 3 months is more than enough time for it to go bad, and to gum-up the carbs in the process.

subwoofer wrote:
5. (Snip)...
Carbs are Spec 5, btw.
Okay, I should have read on before posting my first reply. Spec 5 calls for 10 gram floats set to 16.5 - 17.0 mm height. Check that. The weight in grams, or the part number are molded into the float. Some float weights are hard to come by now, or just unobtainium. If a different weight float has been installed, then the float height must also be changed to a level appropriate for the weight used. The other weight options are (were ?) 8.5 and 7.0 grams. If either of them were substituted without adjusting the height, then an overall lean condition will result.

subwoofer wrote:
6. Heat soak problem in carbs: so far the most probable cause. It explains the time constant, inlet manifold is hot to touch for a long time after driving.What temperature thermostat is installed?

Last edited on 06-17-2015 08:03 pm by Esprit2