I keep typing 87 i`m so sory it`s a 78 NOT 87 i have a very bad habit of transposing numbers.
& as for the problem it`s just as I typed before. the divider between the gas & oil tanks was leaking so we began putting mixed gas in it & not using the oil tank. The pump began making a sucking sound about a year ago. Now it pops & the cover on it pulls up. First it was only popping once then it started in trippels. It loses power when it dose this.