BEIJING, Sept 9 (Reuters) - China"s factory gate inflation hit a 13-year high in August driven by roaring raw materials prices despite Beijing"s attempts to cool them, putting more pressure on manufacturers in the world"s second-largest economy. The producer price index (PPI) rose 9.5% from a year earlier in August, the National Bureau of Statistics (NBS) said on Thursday, faster than the 9.0% increase tipped in a Reuters poll and the 9.0% reported in July. That was the fastest pace since August 2008. China"s economy has recovered strongly from last year"s coronavirus slump but has been losing steam recently due to domestic COVID-19 outbreaks, high raw material prices, tighter property curbs and a campaign to reduce carbon emissions. Commodity prices have been on a tear in recent months, hurting the bottom lines of many mid- and downstream factories. China"s coal prices soared to a record high on Tuesday over supply concerns as major coal regions started fresh rounds of safety checks. read more Earnings at China"s industrial firms have slowed for five straight months. read more But coal and metals prices will likely drop back as construction activity falls amid restrictions on the property sector and slowing credit growth, Julian Evans-Pritchard, senior China economist at Capital Economics, wrote in a note. And the higher comparison base towards the end of last year will also pull down overall inflation. "We doubt producer price inflation will rise much further," he said. The coal, chemicals and metals industries drove much of the price increases in August, according to a statement released alongside the data by Dong Lijuan, an NBS official. Prices in the coal mining and washing sector grew 57.1% in August from a year earlier. A separate NBS statement showed that the consumer price index (CPI) in August rose 0.8% from a year earlier, compared with a 1.0% gain in a Reuters poll and below the government target of around 3% this year. China tightened social restrictions to curb the COVID-19 Delta variant including travel limits, which have hampered service-sector demand, although Beijing has largely contained the latest coronavirus outbreaks. Declines in airfares, travel and hotel room prices due to the pandemic slowed consumer inflation on a monthly basis, according to NBS"s Dong. Service-sector activity plunged in August to the lowest level since the pandemic"s first wave in April 2020, a recent survey showed, as COVID-19 restrictions threatened to derail the recovery. read more Many analysts expect the People"s Bank of China to deliver a further cut to the amount of cash banks must hold as reserves later this year to lift growth, on top of July"s cut, which released around 1 trillion yuan ($6.47 trillion) in long-term liquidity into the economy. The core consumer price index, which strips out volatile food and energy prices, stood at 1.2% on year, versus a 1.3% rise in July.