Rotomo 3 #1 Posted July 11, 2018 Hi guys, i got no spark at all, what sort of gap should I have and anything else that might cause no spark. Also need a diaphragm for the carb. It’s a 3/4 hp compact. Share this post Link to post Share on other sites
factory 487 #2 Posted July 14, 2018 The gap between the coil and the flywheel should be .010", you can use a piece of card of the appropriate thickness to keep the coil in place against the flywheel magnets while the screws are being tightened, if adjustment is needed. First thing to check if there is no spark would be the points that are housed behind the flywheel, these could need cleaning and the gap checking (usually .020" but listed as .015" on the decal on earlier engines), if there is still no spark then you could check the wiring and the coil secondary winding resistance if you have a multimeter, though it's rare for the coil to go bad. I recommended you have a read of the carb rebuild thread if you haven't already, Webhead on here sells new carb diaphragms (also Wallfish has them too). And finally if you have the original air filter assembly don't forget to clean out the old crumbly filter foam from it. David Share this post Link to post Share on other sites
Rotomo 3 #3 Posted July 14, 2018 (edited) This is what i got. Must be missing the whole setup. Looks through literature section for information. Edited July 14, 2018 by Rotomo Share this post Link to post Share on other sites
factory 487 #4 Posted July 15, 2018 Sorry, I should have mentioned the points cover under the flywheel, take the two screws out & remove the cover, the points are under that (as below). David Share this post Link to post Share on other sites
Rotomo 3 #5 Posted July 16, 2018 (edited) All sorted, I gave the points a clean and it had a cough and splitter and run for a few seconds. Just need a diaphragm and a fuel tank. Might make a stainless steel tank up at work. I’m hoping the tank was just a standard tank of sorts with a breather and outlet. Thanks for the help David. Edited July 16, 2018 by Rotomo Share this post Link to post Share on other sites
factory 487 #6 Posted July 21, 2018 There are two main types of tank offered with these engines, an alloy base tank that the engine sits on, or a round steel can tank (some with an internal vent pipe to allow use at various angles). Some tools like the chainsaws and drills had their own special tanks designed for them. If this is the engine from your introduction thread here: Then the tank supplied with it would have been the round steel can type as shown in the diagram below. If you would like any pictures or measurements to help with making a replacement, let me know. David Share this post Link to post Share on other sites
