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eric1617 hat geschrieben:Welche Maßnahmen schlagt ihr vor wenn ich einen Motor nach 20 jähriger Standzeit wieder in Betrieb nehmen will ?

try hand turning the motor first (with a little oil down the plug holes to ease it). Sometimes if you leap right into trying to start it on the key the motor will sieze. I've heard all manner of trick to ease a motor if its a little sticky, such things as using Diet Coke or Plus Gas or other things squirted in through the plug holes as a releasing agent, but to be honest I've never tried this. I find they are either stuck so bad you have to hammer the the pistons out or they turn over pretty good. just make sure theres oil up the bores before starting.

The fuel will have gone off. Either unhook the line from the tank side of the fuel pump and run a short flexi hose into a can of fuel and run it off that to test run it, or drain the fuel tank down and refil with some fresh fuel.

Take the top of the carb off and fill up the float bowls with fresh fuel and refit the carb top. This will mean that engine fires before it has to pull fuel through from the tank or your can. You don't want to be turning and turning a "dry" motor without it firing as this will wear the hell out of the bores or make it sieze.

Check the oil before you start. It will probably be sludge. Best to drain it and refill with clean oil. I'd use some flushing oil (other people have recomended Parafin) to run though or maybe even pull the sump and clean that out. All the yuk that has drained back over the last years and settled in the sump - you don't want that waking up and flowing round the motor. Change the oil filter too.

Don't forget to check there is fluid in the transmission.

Clean or replace the spark plugs, check the contact breaker points and rotor arm.

If the motor doesn't fire right up don't keep winding it over on the starter, check why its not running. If you primed the carburettor it should fire pretty much right away if everything else is OK.

After long storage the LT connectors to the coil and such may have corroded a bit and you'll have a load of bad ground connections too. Just clean them up with emery paper and hopefully these should be OK.

judge hat geschrieben:@superbee: den musst erst mal zum laufen bringen...das ist ja das problem

dass ohne öl wenig geht ist ja klar... und das evtl. feste uralt-öl schmiert halt net wirklich... im gegenteil.

ist er fest und reißt du den motor einfach so durch, kommt's drauf an, ob

1)der anlasser nicht gleich ab ist... und nix weiter passiert.

2) ist der anlasser so stark, dass er den festgerosteten motor auch nur anreißt, ist von kolbenringen bis zylinderwand und lagern alles hin, je nach dem kommt halt ventiltrieb,ölpumpe und ein hübscher funkenflug bei mieser elektrik und benzinfluss bei undichter leitung/verdrecktem vergaser zusammen.... dann hast eine einbrenn-lackierung...