View Full Version : Engine dies

06-24-2012, 05:23 PM
Folks --

1987 ProStar. Recently accomplished maintenance: Points, cap, rotor, condensor -- new battery -- carb rebuild, fuel filter, fuel pump filter. Boat ran like a dream on dry land.

Took it out today, idles OK. Pulled the 11 yr old boy on a slalom pass, 2900 RPM, engine died in less than 60 seconds. It felt like fuel starvation, a gradual but irreversible loss of RPM all the way to zero. Excessive cranking and she coughed back to life -- felt like the cranking replenished the fuel bowls and she finally started. But, please don't let my speculation cloud your trouble-shooting karma. Went for another 2900 RPM run (no skier this time) and she died again in less than 60 seconds. Same start-up sequence, then idled back to the ramp. She will idle all day.

Any ideas?


06-24-2012, 05:31 PM
fuel pump maybe???

06-24-2012, 05:37 PM
Do You Have this Fuel Filter Assembly?
If So - remove the can - may be somewhat plugged.
MANUAL (http://www.mastercraft.com/files/manuals/1987-1991_OwnersManual-TriStar.pdf)

If you can get the fuel line off - between pump & carb - place an empty bottled water jug over fuel line -
crank only with out firing it up to see decent flow.
That should verify line to tank is open & free of blockage.

06-24-2012, 06:34 PM

06-24-2012, 06:40 PM
Just crack the compression fitting nut on top of the pump. You can tell if you're getting fuel of not, without taking it apart.. That fuel line is a pain. Don't mess it up (threads and all). It happens easily.

Also consider replacing you fuel line in that year model. The farmer's subsidy cornhole program is killing pure gasoline and fuel lines.


careful cloaked...they might move this thread over to the ROn Paul thread... :D