Hi all,
I have 1989 Mercury 150 xr4 on a 1990 Skeeter 175 DX.
The motor hasn't been run in about 3 years and I decided to spend some time on this boat to get it running.
I'm a shade tree mechanic at best. So, I try stuff to save money, but I am not trained by any means.
Before cranking it, I took the spark plugs out and sprayed a bunch of WD40 in the cylinders.
I spun the starter and it seemed to spin easily.
Then I bought carb kits and an impeller and soaked and cleaned the carbs and reassembled.
I replaced the spark plugs with new ones.
I replaced the impeller which was still in good shape.
Really, the motor is in very good condition.
The compression is kind of low. All cylinders around 92 +- 2psi.
I have a Clymer Mercury repair manual and followed the directions for doing the link and sync.
In general, I am pretty happy with the way the motor runs.
I have fresh gas in the tank. Someone had removed the oil injection a long time before I got it. I mix the gas 50:1.
The motor starts well, has good power. I got the boat up to 57 mph yesterday.
However, when I come back to the ramp and have to idle for about 5 minutes going through a no-wake zone, after a few minutes at idle, the motor gets rougher and rougher and eventually dies.
On going out, the motor idles fine.
Can anyone point me in the right direction? The motor temperature seems okay.
This is not a big deal for me as I am pretty happy otherwise, but if I can fix it, then I would like to do that.
Thanks for any help.