diff --git a/bchain/coins/eth/ethrpc.go b/bchain/coins/eth/ethrpc.go
index 9656e6c3..eb0bdc2d 100644
--- a/bchain/coins/eth/ethrpc.go
+++ b/bchain/coins/eth/ethrpc.go
@@ -31,11 +31,13 @@ const (
 
 // Configuration represents json config file
 type Configuration struct {
-	CoinName             string `json:"coin_name"`
-	CoinShortcut         string `json:"coin_shortcut"`
-	RPCURL               string `json:"rpc_url"`
-	RPCTimeout           int    `json:"rpc_timeout"`
-	BlockAddressesToKeep int    `json:"block_addresses_to_keep"`
+	CoinName                    string `json:"coin_name"`
+	CoinShortcut                string `json:"coin_shortcut"`
+	RPCURL                      string `json:"rpc_url"`
+	RPCTimeout                  int    `json:"rpc_timeout"`
+	BlockAddressesToKeep        int    `json:"block_addresses_to_keep"`
+	MempoolTxTimeoutHours       int    `json:"mempoolTxTimeoutHours"`
+	QueryBackendOnMempoolResync bool   `json:"queryBackendOnMempoolResync"`
 }
 
 // EthereumRPC is an interface to JSON-RPC eth service.
@@ -162,7 +164,8 @@ func (b *EthereumRPC) Initialize() error {
 // CreateMempool creates mempool if not already created, however does not initialize it
 func (b *EthereumRPC) CreateMempool(chain bchain.BlockChain) (bchain.Mempool, error) {
 	if b.Mempool == nil {
-		b.Mempool = bchain.NewMempoolEthereumType(chain)
+		b.Mempool = bchain.NewMempoolEthereumType(chain, b.ChainConfig.MempoolTxTimeoutHours, b.ChainConfig.QueryBackendOnMempoolResync)
+		glog.Info("mempool created, MempoolTxTimeoutHours=", b.ChainConfig.MempoolTxTimeoutHours, ", QueryBackendOnMempoolResync=", b.ChainConfig.QueryBackendOnMempoolResync)
 	}
 	return b.Mempool, nil
 }
diff --git a/bchain/mempool_ethereum_type.go b/bchain/mempool_ethereum_type.go
index 4eb5b969..33e44e72 100644
--- a/bchain/mempool_ethereum_type.go
+++ b/bchain/mempool_ethereum_type.go
@@ -6,24 +6,28 @@ import (
 	"github.com/golang/glog"
 )
 
-const mempoolTimeoutTime = 24 * time.Hour
 const mempoolTimeoutRunPeriod = 10 * time.Minute
 
 // MempoolEthereumType is mempool handle of EthereumType chains
 type MempoolEthereumType struct {
 	BaseMempool
-	nextTimeoutRun time.Time
+	mempoolTimeoutTime   time.Duration
+	queryBackendOnResync bool
+	nextTimeoutRun       time.Time
 }
 
 // NewMempoolEthereumType creates new mempool handler.
-func NewMempoolEthereumType(chain BlockChain) *MempoolEthereumType {
+func NewMempoolEthereumType(chain BlockChain, mempoolTxTimeoutHours int, queryBackendOnResync bool) *MempoolEthereumType {
+	mempoolTimeoutTime := time.Duration(mempoolTxTimeoutHours) * time.Hour
 	return &MempoolEthereumType{
 		BaseMempool: BaseMempool{
 			chain:        chain,
 			txEntries:    make(map[string]txEntry),
 			addrDescToTx: make(map[string][]Outpoint),
 		},
-		nextTimeoutRun: time.Now().Add(mempoolTimeoutTime),
+		mempoolTimeoutTime:   mempoolTimeoutTime,
+		queryBackendOnResync: queryBackendOnResync,
+		nextTimeoutRun:       time.Now().Add(mempoolTimeoutTime),
 	}
 }
 
@@ -90,11 +94,20 @@ func (m *MempoolEthereumType) createTxEntry(txid string, txTime uint32) (txEntry
 // Resync ethereum type removes timed out transactions and returns number of transactions in mempool.
 // Transactions are added/removed by AddTransactionToMempool/RemoveTransactionFromMempool methods
 func (m *MempoolEthereumType) Resync() (int, error) {
+	if m.queryBackendOnResync {
+		txs, err := m.chain.GetMempoolTransactions()
+		if err != nil {
+			return 0, err
+		}
+		for _, txid := range txs {
+			m.AddTransactionToMempool(txid)
+		}
+	}
 	m.mux.Lock()
 	entries := len(m.txEntries)
 	now := time.Now()
 	if m.nextTimeoutRun.Before(now) {
-		threshold := now.Add(-mempoolTimeoutTime)
+		threshold := now.Add(-m.mempoolTimeoutTime)
 		for txid, entry := range m.txEntries {
 			if time.Unix(int64(entry.time), 0).Before(threshold) {
 				m.removeEntryFromMempool(txid, entry)
diff --git a/configs/coins/ethereum-classic.json b/configs/coins/ethereum-classic.json
index 93e4268f..7889e415 100644
--- a/configs/coins/ethereum-classic.json
+++ b/configs/coins/ethereum-classic.json
@@ -1,9 +1,9 @@
 {
   "coin": {
-      "name": "Ethereum Classic",
-      "shortcut": "ETC",
-      "label": "Ethereum Classic",
-      "alias": "ethereum-classic"
+    "name": "Ethereum Classic",
+    "shortcut": "ETC",
+    "label": "Ethereum Classic",
+    "alias": "ethereum-classic"
   },
   "ports": {
     "backend_rpc": 8037,
@@ -41,17 +41,20 @@
     "internal_binding_template": ":{{.Ports.BlockbookInternal}}",
     "public_binding_template": ":{{.Ports.BlockbookPublic}}",
     "explorer_url": "",
-    "additional_params": "-resyncindexperiod=4441",
+    "additional_params": "-resyncindexperiod=4441 -resyncmempoolperiod=2011",
     "block_chain": {
       "parse": true,
       "mempool_workers": 8,
       "mempool_sub_workers": 2,
       "block_addresses_to_keep": 300,
-      "additional_params": {}
+      "additional_params": {
+        "mempoolTxTimeoutHours": 48,
+        "queryBackendOnMempoolResync": true
+      }
     }
   },
   "meta": {
     "package_maintainer": "Petr Kracik",
     "package_maintainer_email": "petr.kracik@satoshilabs.com"
   }
-}
+}
\ No newline at end of file
diff --git a/configs/coins/ethereum.json b/configs/coins/ethereum.json
index 75ca8012..ebf40a4a 100644
--- a/configs/coins/ethereum.json
+++ b/configs/coins/ethereum.json
@@ -1,9 +1,9 @@
 {
   "coin": {
-      "name": "Ethereum",
-      "shortcut": "ETH",
-      "label": "Ethereum",
-      "alias": "ethereum"
+    "name": "Ethereum",
+    "shortcut": "ETH",
+    "label": "Ethereum",
+    "alias": "ethereum"
   },
   "ports": {
     "backend_rpc": 8036,
@@ -49,11 +49,14 @@
       "mempool_workers": 8,
       "mempool_sub_workers": 2,
       "block_addresses_to_keep": 300,
-      "additional_params": {}
+      "additional_params": {
+        "mempoolTxTimeoutHours": 48,
+        "queryBackendOnMempoolResync": false
+      }
     }
   },
   "meta": {
     "package_maintainer": "Petr Kracik",
     "package_maintainer_email": "petr.kracik@satoshilabs.com"
   }
-}
+}
\ No newline at end of file
diff --git a/configs/coins/ethereum_testnet_ropsten.json b/configs/coins/ethereum_testnet_ropsten.json
index 1f8f603e..6c064490 100644
--- a/configs/coins/ethereum_testnet_ropsten.json
+++ b/configs/coins/ethereum_testnet_ropsten.json
@@ -1,9 +1,9 @@
 {
   "coin": {
-      "name": "Ethereum Testnet Ropsten",
-      "shortcut": "tROP",
-      "label": "Ethereum Ropsten",
-      "alias": "ethereum_testnet_ropsten"
+    "name": "Ethereum Testnet Ropsten",
+    "shortcut": "tROP",
+    "label": "Ethereum Ropsten",
+    "alias": "ethereum_testnet_ropsten"
   },
   "ports": {
     "backend_rpc": 18036,
@@ -48,11 +48,14 @@
       "mempool_workers": 8,
       "mempool_sub_workers": 2,
       "block_addresses_to_keep": 300,
-      "additional_params": {}
+      "additional_params": {
+        "mempoolTxTimeoutHours": 12,
+        "queryBackendOnMempoolResync": false
+      }
     }
   },
   "meta": {
     "package_maintainer": "Petr Kracik",
     "package_maintainer_email": "petr.kracik@satoshilabs.com"
   }
-}
+}
\ No newline at end of file