cheezomlet
New member
"I have an 1984 Glassport with
"I have an 1984 Glassport with a 120hp Mercruiser I/O.
I have owned this boat for 7 years trouble free, I keep up on the maintenance and never had a problem until recently, so heregoes!
The motor starts right up great when cold, every time, but it seems when I travel for a period of time at higher speeds, when I slow down to idle it will just sputter and stall. Then it will not start back up. Cranks over good, just will not fire. Then if I let it sit for about 10 mins it will start like it is loaded up (flooded, missing) and then idle back perfectly in seconds.
It seems the plenum under the carb is pretty hot, it vaporizes the gas when it hits it, and if I pull a plug it dont seem to be getting fuel.
The temps stay below 140 deg and it is getting plenty of fuel and spark.
Here is what I did sofar and still does the same thing:
-New impellor
-New starter
-Compression good
-Spark good (pertronix)
-Fuel supply good, cleaned filters
-Checked the Risers and manifolds, they are clear
-Took the Tstat out.
-Changed gas in tank (for possible water)
-Checked timing
-Carb was reman about 3 years ago, still clean.
Any ideas or similar problems other people have had like this? I am really running out of ideas that could cause this.
Thanks in advance
"
"I have an 1984 Glassport with a 120hp Mercruiser I/O.
I have owned this boat for 7 years trouble free, I keep up on the maintenance and never had a problem until recently, so heregoes!
The motor starts right up great when cold, every time, but it seems when I travel for a period of time at higher speeds, when I slow down to idle it will just sputter and stall. Then it will not start back up. Cranks over good, just will not fire. Then if I let it sit for about 10 mins it will start like it is loaded up (flooded, missing) and then idle back perfectly in seconds.
It seems the plenum under the carb is pretty hot, it vaporizes the gas when it hits it, and if I pull a plug it dont seem to be getting fuel.
The temps stay below 140 deg and it is getting plenty of fuel and spark.
Here is what I did sofar and still does the same thing:
-New impellor
-New starter
-Compression good
-Spark good (pertronix)
-Fuel supply good, cleaned filters
-Checked the Risers and manifolds, they are clear
-Took the Tstat out.
-Changed gas in tank (for possible water)
-Checked timing
-Carb was reman about 3 years ago, still clean.
Any ideas or similar problems other people have had like this? I am really running out of ideas that could cause this.
Thanks in advance