Shane Gibbs
Member
Hi Guys,
I have a pair of BF135's on a Cat that I have had many problems with due to buying this project boat "as is". Thankfully to date all previous problems have now been sorted ( thanks iang6766 ) and this is now my last known issue.
This last problem has me struggling again.... The port engine buzzer/alarm comes on and RPM drops back to almost idle when i run at full throttle only. If I key off and restart alarm goes off and i can run around as normal for hours unless getting back to full throttle and running for about 3 or 4 minutes again. In the past i suspected a wiring issue but this last weekend i did notice the overheat light coming on when alarm sounds. This alarm at full RPM's had been an issue for the previous owner and he eventually gave up after spending a heap of money, stuffing a whole lot of things up and then leaving it sitting for 18 months.
To date I have changed out complete water pump asms
Changed thermostats
Back flushed with various chemicals and water
Pulled the legs again today and loosened off the water pipe that goes up extension housing to the oil pan area- inspected the grommet. Couldn't remove the pipe itself but its not blocked. In fact it looks new from the outside. gromit is perfect
The engine pee's fine but it does pee a little less that the stb engine that has zero issues.
There is no obvious corrosion in anything I have pulled apart.
I have pulled all 4 temp sensors and ohms tested against the good engine fine
With all the flushing, back flushing and chemical flushes I have done over the last few weeks I have got no nasty stuff out of anywhere
Im working in Papua New Guinea so don't have ready access to a Dr H or Honda dealership
I have run a heat gun over everything when in shop running in a trough but no high temps, pee runs cool until the trough water get up in temp. In saying that the alarm doesn't go off in the workshop trough...
Thinking of putting back on the water and doing more testing but not sure where to start
Is there something else I should be looking at? Any advice whatsoever would be appreciated
Cheers
I have a pair of BF135's on a Cat that I have had many problems with due to buying this project boat "as is". Thankfully to date all previous problems have now been sorted ( thanks iang6766 ) and this is now my last known issue.
This last problem has me struggling again.... The port engine buzzer/alarm comes on and RPM drops back to almost idle when i run at full throttle only. If I key off and restart alarm goes off and i can run around as normal for hours unless getting back to full throttle and running for about 3 or 4 minutes again. In the past i suspected a wiring issue but this last weekend i did notice the overheat light coming on when alarm sounds. This alarm at full RPM's had been an issue for the previous owner and he eventually gave up after spending a heap of money, stuffing a whole lot of things up and then leaving it sitting for 18 months.
To date I have changed out complete water pump asms
Changed thermostats
Back flushed with various chemicals and water
Pulled the legs again today and loosened off the water pipe that goes up extension housing to the oil pan area- inspected the grommet. Couldn't remove the pipe itself but its not blocked. In fact it looks new from the outside. gromit is perfect
The engine pee's fine but it does pee a little less that the stb engine that has zero issues.
There is no obvious corrosion in anything I have pulled apart.
I have pulled all 4 temp sensors and ohms tested against the good engine fine
With all the flushing, back flushing and chemical flushes I have done over the last few weeks I have got no nasty stuff out of anywhere
Im working in Papua New Guinea so don't have ready access to a Dr H or Honda dealership
I have run a heat gun over everything when in shop running in a trough but no high temps, pee runs cool until the trough water get up in temp. In saying that the alarm doesn't go off in the workshop trough...
Thinking of putting back on the water and doing more testing but not sure where to start
Is there something else I should be looking at? Any advice whatsoever would be appreciated
Cheers