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440 issues
Posted: Mon Sep 06, 2010 10:01 pm
by gofish103
worked on a friends 36 this weekend. he was having problems with the motor stalling at low rpms.
we've changed all fuel filters, plugs, cap, rotor and the intake choke spring and metering rod.
starts fine, idles in nuetral, but when you put it in gear it stalls. if ya pick up the idle a little it seems ok. Need advice!!
Posted: Tue Sep 07, 2010 5:19 am
by Danny Bailey
It is possible there could be something on the prop causing it to be excessively hard to turn, or the transmission clutch plates could have been overheated causing them to stick and making the transmission hard to turn.
Posted: Tue Sep 07, 2010 7:22 am
by g36
what kind of idle speed are you trying to obtain?
Posted: Tue Sep 07, 2010 9:50 pm
by gofish103
rpm's are in the 700 range. trying to dock the boat is the issue, trying to keep the motor running and docking
Posted: Wed Sep 08, 2010 8:14 am
by ready123
gofish103 wrote:rpm's are in the 700 range. trying to dock the boat is the issue, trying to keep the motor running and docking
Are you saying the engine does not keep running while shifting in and out of gear while docking?
Posted: Wed Sep 08, 2010 5:35 pm
by Danny Bailey
Incorrect timing can also cause low torque at idle.
Posted: Wed Sep 08, 2010 9:53 pm
by Big D
Check your timing as mentioned. If it's OK, check to see if all cylinders are firing by running the engine to temp, then pull one plug wire at a time from the distributor. If the cylinder is firing, you will note a drop in RPM or performance, you should hear a difference. Reinstall the wire and move on to the next one. If no change is noted when you pull one of the wires, that cylinder is not firing. Had this issue before and turned out to be 2 bad new plug wires after a tune-up.