Picked up a bass boat that was under a tree for a couple years. Restored the boat, engine ran but struggling with the alarm system.
Been down countless troubleshooting threads. Engine runs great but what I think is the restriction alarm goes off after a short bit of running and not even WOT. All detail chronicled below but my confusion lies in the description of the alarms. I am getting an alarm that goes off about every 1 sec. ( ear piercing BTW ). Some say that is VRO and that restriction and overtemp are solid tone. If my VRO harness is unplugged and alarm wire is not connected. How could it be anything other than restriction?
Here's what's been done -
VRO disconnected. harness unplugged - did this right from the get go.
pumped the tank out - owner said only ever used 93. Pumped about 11 gal out.
on first run, took it to the river, ran about 25-30mph for just a few min. stopped to fish a bit, returned to the dock.
2nd run - idled around in a marina, listened to liven music then when for a run out in the open river - less than 5 min running about 35 or so, alarm. Shut it down, tried to just idle back but kept alarming after running 30 sec to 1 min.
from there - put in new t-stats and poppet valves, took my infrared gun along and ran until alarm. Temps are perfect. unplugged sensor wires one at a time. each head then fuel vacuum switch. didn't stop until vacuum switch.
figured it was something in the lines or air. replaced fuel filter and lines in engine compartment. inspected fuel pump diaphrams, looked good but ordered a new set anyway.
someone suggested running on a portable tank to isolate. borrowed a 6 gal tank, took to river, ran like a champ.
ordered new pickup tube for tank, installed tube, new hose and new primer bulb - test run - same damn alarm.
ran out of time so took the portable take w me to NY on vacation. Ran off that tank for a solid 10-15 min at 40mph. No alarm.
noticed that new primer bulb wasn't holding the fuel in the engine bay.
back home, out to river, run another portable tank test just to be sure all ok, damn alarm comes on. Could barely idle back to dock w/out alarm
FYI - when alarm comes on, NO performance change is noted, just scared of burning a piston if it's really actually running lean.
The only two components that are not rebuilt or new are the vacuum switch ( no longer available ) and the pulse dampener.
I thought I read an article but cannot find it on how much vacuum it takes to trigger the switch. I could then use a vac pump/guage to test the internal switching. Anyone know how many PSI triggers it?
Anything else I might be missing? Like I said, might be just an alarm issue but I didn't want to take any chances with killing the motor. This was a swinging deal and two lakes that I fish are electric only so I've gotten good use from the boat but want to get out on the upper chesapeake bay to fish and for that, I need this engine to run.
Thanks!
Been down countless troubleshooting threads. Engine runs great but what I think is the restriction alarm goes off after a short bit of running and not even WOT. All detail chronicled below but my confusion lies in the description of the alarms. I am getting an alarm that goes off about every 1 sec. ( ear piercing BTW ). Some say that is VRO and that restriction and overtemp are solid tone. If my VRO harness is unplugged and alarm wire is not connected. How could it be anything other than restriction?
Here's what's been done -
VRO disconnected. harness unplugged - did this right from the get go.
pumped the tank out - owner said only ever used 93. Pumped about 11 gal out.
on first run, took it to the river, ran about 25-30mph for just a few min. stopped to fish a bit, returned to the dock.
2nd run - idled around in a marina, listened to liven music then when for a run out in the open river - less than 5 min running about 35 or so, alarm. Shut it down, tried to just idle back but kept alarming after running 30 sec to 1 min.
from there - put in new t-stats and poppet valves, took my infrared gun along and ran until alarm. Temps are perfect. unplugged sensor wires one at a time. each head then fuel vacuum switch. didn't stop until vacuum switch.
figured it was something in the lines or air. replaced fuel filter and lines in engine compartment. inspected fuel pump diaphrams, looked good but ordered a new set anyway.
someone suggested running on a portable tank to isolate. borrowed a 6 gal tank, took to river, ran like a champ.
ordered new pickup tube for tank, installed tube, new hose and new primer bulb - test run - same damn alarm.
ran out of time so took the portable take w me to NY on vacation. Ran off that tank for a solid 10-15 min at 40mph. No alarm.
noticed that new primer bulb wasn't holding the fuel in the engine bay.
back home, out to river, run another portable tank test just to be sure all ok, damn alarm comes on. Could barely idle back to dock w/out alarm
FYI - when alarm comes on, NO performance change is noted, just scared of burning a piston if it's really actually running lean.
The only two components that are not rebuilt or new are the vacuum switch ( no longer available ) and the pulse dampener.
I thought I read an article but cannot find it on how much vacuum it takes to trigger the switch. I could then use a vac pump/guage to test the internal switching. Anyone know how many PSI triggers it?
Anything else I might be missing? Like I said, might be just an alarm issue but I didn't want to take any chances with killing the motor. This was a swinging deal and two lakes that I fish are electric only so I've gotten good use from the boat but want to get out on the upper chesapeake bay to fish and for that, I need this engine to run.
Thanks!