I have a 1985 Johnson 175HP J175TXCOC that has been giving me problems for a few weeks now and I can't seem to figure out the problem.
Take it to the lake and it will run fine for about 20 minutes or so, then it will stall and not restart. Usually when I'm at idle or around half throttle. It will act like it going to restart;the starter disengages then just sputters. Usually by the time I paddle back to the ramp or get pulled back it will fire right up.
The primer ball stays firm and I have a glass fuel filter after the primer ball that I can see fuel in.
Spark is tested good
Compression is alright; port side 80 - 85, starboard side 75 - 85
Yesterday I got an external tank to try out. This gave me similar problems but added a constant alarm beep to the mix right before it died. As with the other times engine would not restart once it shut down on its own.
I thought overheating so I checked the powerhead and I could hold my hand on there for a few seconds, it was warm but not scorching hot or enough to boil water droplets off the head.
When I got back home I checked the thermostats in a pot of hot water and they opened, so I cleaned up the housing and reinstalled the thermostats.
Engine will run just fine on the hose with ear muffs.
What other steps could I take to get this unknown issue resolved?
Take it to the lake and it will run fine for about 20 minutes or so, then it will stall and not restart. Usually when I'm at idle or around half throttle. It will act like it going to restart;the starter disengages then just sputters. Usually by the time I paddle back to the ramp or get pulled back it will fire right up.
The primer ball stays firm and I have a glass fuel filter after the primer ball that I can see fuel in.
Spark is tested good
Compression is alright; port side 80 - 85, starboard side 75 - 85
Yesterday I got an external tank to try out. This gave me similar problems but added a constant alarm beep to the mix right before it died. As with the other times engine would not restart once it shut down on its own.
I thought overheating so I checked the powerhead and I could hold my hand on there for a few seconds, it was warm but not scorching hot or enough to boil water droplets off the head.
When I got back home I checked the thermostats in a pot of hot water and they opened, so I cleaned up the housing and reinstalled the thermostats.
Engine will run just fine on the hose with ear muffs.
What other steps could I take to get this unknown issue resolved?