The iboats forum moderators are excited to announce that at this time it appears the iboats forums posting pictures function is working once again. Though we cannot promise for how long, we're hoping for indefinitely.
1974 Merc 140. Combined intake/exhaust manifold.<br /><br />The manifold is off. How can I check for cracks that might allow water (from the raw water exit passages) to leak into the intake ports?<br /><br />Is this strictly a visual process (with or without dye penetrant), or is there some...
Maybe this will help someone:<br /><br />My fuel line is No Longer Available. I was looking into fabricating one or having a hose made up when someone recommended I contact this "obsolete parts house":<br /><br />SeaWay Marine, Seattle, 800-332-0803<br /><br />They had it! They also said they...
1974 Merc 140, engine s/n 388...., stern drive s/n 390....<br /><br />Used to overheat only at high rpm, now overheating at all rpm. Overheats very slowly at idle, slowly at 1500 rpm, very quickly above 3000 rpm.<br /><br />I ran a simple test tonight, and have some questions about the results...
Merc 140 - Problem 2 - Ignition Coil gets Hot<br /> <br />This problem is related to "Merc 140 - Problem 1 - Engine Overheats at High RPM" which I just posted, but I believe it is an independent problem.<br /> <br />When running at 2500 to 4200 rpm, my ignition coil gets very hot. When I...
Merc 140 - Problem 1 - Engine Overheats at High RPM<br /> <br />Hello. Thank you in advance for any input.<br /> <br />My 1974 Mercruiser 140 holds 137 degF steady at idle, about 145-150 degF at 2500 rpm, but above 3500 rpm the water temp slowly climbs. I throttle back when it reaches 180-190...
Merc 140 - Problem 2 - Ignition Coil gets Hot<br /> <br />This problem is related to "Merc 140 - Problem 1 - Engine Overheats at High RPM" which I just posted, but I believe it is an independent problem.<br /> <br />When running at 2500 to 4200 rpm, my ignition coil gets very hot. When I...
Merc 140 - Problem 1 - Engine Overheats at High RPM<br /> <br />Hello. Thank you in advance for any input.<br /> <br />My 1974 Mercruiser 140 holds 137 degF steady at idle, about 145-150 degF at 2500 rpm, but above 3500 rpm the water temp slowly climbs. I throttle back when it reaches 180-190...
