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Hey guys,
I've got a 2002 Yamaha 30hp 2 stroke oil injection and it's been giving me issues since I pulled it out of storage. I've cleaned out the carbs, checked the oil pump, new spark plugs, new fuel pump diaphragm, checked the compression (all 3 cylinders were around 70psi, it's a pull start so that's probably as high as it will get I think). I also flushed out all the old oil in the injection system and put new yamaha brand oil in.
Anyways I've still got an issue where it will miss on at least 3 or 4 cycles in a row every 2-3 seconds. It will be running fine and then the revs drop drastically, usually it picks itself up and then runs fine but sometimes it stalls after that.
I've put an inline spark checker on and can't notice any loss of spark on any of the cylinders when it happens so I think I've ruled out ignition issues.
Also it blows a bit of white smoke at idle, and quite a lot of white smoke when you rev it up.
I've got a timing light but I haven't been able to hook it up because it doesn't really have an alternator and I don't have a spare 12v battery lying around. I've got it in a spot now though where I can move my car up to it so I'll try that later today and see how it goes, but like I said I don't think it's an ignition issue.
Anyone got any ideas?
I've got a 2002 Yamaha 30hp 2 stroke oil injection and it's been giving me issues since I pulled it out of storage. I've cleaned out the carbs, checked the oil pump, new spark plugs, new fuel pump diaphragm, checked the compression (all 3 cylinders were around 70psi, it's a pull start so that's probably as high as it will get I think). I also flushed out all the old oil in the injection system and put new yamaha brand oil in.
Anyways I've still got an issue where it will miss on at least 3 or 4 cycles in a row every 2-3 seconds. It will be running fine and then the revs drop drastically, usually it picks itself up and then runs fine but sometimes it stalls after that.
I've put an inline spark checker on and can't notice any loss of spark on any of the cylinders when it happens so I think I've ruled out ignition issues.
Also it blows a bit of white smoke at idle, and quite a lot of white smoke when you rev it up.
I've got a timing light but I haven't been able to hook it up because it doesn't really have an alternator and I don't have a spare 12v battery lying around. I've got it in a spot now though where I can move my car up to it so I'll try that later today and see how it goes, but like I said I don't think it's an ignition issue.
Anyone got any ideas?
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