I have a pair of 1989 130 hp yamahas. one will idle fine but bogs and sputters under load. It has been sitting for 5 months and probably needs the carbs cleaned. are there any special tricks to look for on theese carbs? I am a certified auto tech and <br />have rebuilt auto carbs before, but it has been a long time, they quit using them about 20 years ago. If anyone has any tips or advice or thinks this may not be the problem please let me know.<br />thanks,<br />Mark