I had a set of Lehman
120s rebuilt back in 2008. They were test ran and performed flawlessly, but personal issues sidelined the installation
. They sat inside the engine
room of the boat on land until 2012, when I decided that newer and more powerful engines would be more appropriate. During the time the boat was fallow, I barred the engines over every couple of months. In September 2012, we pulled the Lehmans and just last week I took them back to the rebuilder for a check up before I list them for sale
I just got a call from the mechanic
No. 1 started right up and ran fine, but when he applied throttle the engine went to 2650 -- the no load WOT RPM
-- and stayed there. Moving the throttle lever back to idle had no effect nor did the shut down lever. They shut it down with a board over the intake to close off the air supply.
noted that two bolts had been removed from the injection pump, which resulted in the oil
draining out from the sump. He suspects thievery, since apparently sometimes these odd-threaded bolts strip out, and midnight auto supply in the marina gets the hard-to-find parts
He swapped the bolts from Engine No. 2 into the pump on Engine No. 1 prior to restarting it and filled the sump with the proper amount of oil
. He also turned the engine over with the starter until it developed oil pressure before feeding it any fuel
. Oil pressure is 60psi and the engine runs great...it just won't come down off WOT.
I'm more familiar with Detroits, which have a very different fuel
system and rack than these Lehmans. Any thoughts as to what might be wrong? Is there a secret place to bang on them with a hammer to get all the squirrels running right again?