* Czechs start voting in tightly contested two-day election
* Risk of lengthy talks, more weak government
* Debt, corruption issues dominate campaign
(Adds prime minister voting, crown performance, vox pop)
By Robert Mueller and Roman Gazdik
PRAGUE, May 28 (Reuters) - Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms.
The two-day election pits poorer and older voters against younger and wealthier city-dwellers who clash over how to handle a budget deficit that has grown due to economic crisis.
Rightist parties backed by the more affluent warn of a Greek-style meltdown without spending restraint, while leftists backed by older, poorer Czechs pledge to cut spending but raise taxes for high earners and firms to fund higher welfare payouts.
The leftist Social Democrats lead opinion polls. But the party will fall short of a majority and may find it tough to find coalition partners to form a strong cabinet and push through its agenda. It may even be forced into opposition.
Analysts fear an inconclusive result will lead to months of political wrangling over a new cabinet, rattling markets and causing further delays to pension, welfare and healthcare reforms where the Czechs have long lagged their peers.
The European Union and NATO member is slowly recovering from a 4.1 percent economic drop under a caretaker cabinet led by Prime Minister Jan Fischer for the past year. The 2010 budget deficit is projected at 5.3 percent of gross domestic product.
Fischer, who is not running in the election, said after he voted he wished for a swift instalment of a new government.
"The outside world, the European Union, is getting into a complicated situation. There is a lot to think about, to decide on. A number of unfinished reforms lies ahead," he said.
Polling stations opened at 1200 GMT and were to close at 2000, and voting will continue from 0600 until 1200 GMT on Saturday. Early results are expected by Saturday evening.
The crown currency fell to a one-week low at 25.85 against the euro, underperforming central European currencies because of fears of drawn-out coalition talks.
LACK OF CLARITY
Mainstream Czech newspapers have been highly critical of Social Democrat leader Jiri Paroubek for his divisive style and for ousting a centre-right cabinet last year, causing political disarray in the country during its term as EU president.
Leading daily Mlada fronta Dnes urged voters on Friday to block a Social Democrat cabinet backed by the Communists, heirs to the totalitarians whose rule ended with the 1989 Velvet Revolution, and a party divorced from power since then.
Political pundits see such a coalition as the worst possible outcome. "Such a result would bring unbearably high risks for the country's politics, economy and foreign relations," the paper wrote. Paroubek has accused the media of being biased.
The country of 10.5 million people has government debt equivalent to 35 percent of GDP, just half the EU average.
But economists say that figure will grow fast without reforms and could threaten the country's solid credit ratings that are higher than some euro zone states.
They say a rightist government would better implement cost cuts and changes to a pension system strained by an ageing population.
A string of corruption scandals has hit the big established parties, especially the Civic Democrats, who trailed the Social Democrats 3.4-11.5 points in recent polls.
Disillusionment over graft has helped lift smaller groupings such as the conservative TOP09 and the anti-corruption Public Affairs party. Analysts say the Civic Democrats could potentially form a majority coalition with them.
"The main thing is to get rid of the corruption. We need things to be better for the elderly, healthcare and so on," said 80-year-old pensioner Vlasta Turnova, after voting in Prague. (Writing by Jan Lopatka and Michael Winfrey; Editing by Mark Heinrich)