1991 conbrio

**payt002** · 05-14-2003, 10:47 PM

I have a "91 Conbrio, runs to 2200 rpm, then backfires, no power, runs great below 2200???? will go to 3500 or so when initally put into water, but only for a minute??

**Brian Raymond** · 05-14-2003, 11:00 PM

Please specify motor make and model. Did this problem start immediately or slowly evolve. How did the boat perform at the end of last season? Please list any recent service work, winterization methods, and servicing dealer, we should be able to get you up and going with the above info. Brian Raymond

**payt002** · 05-14-2003, 11:06 PM

i just purchased it in march, has less than 200 hrs, a 351,pcm, serviced regularly, had a new carb put on last fall,

**payt002** · 05-14-2003, 11:08 PM

the previous owner states that the Knock sencer should be unhooked, I did this, but not positive where it is, unhooked the one on the rear left head

**Brian Raymond** · 05-14-2003, 11:11 PM

Does your boat have a prestolite distributor with points and condensor, or an electronic module?Brian Raymond

**payt002** · 05-14-2003, 11:14 PM

it is electronic, with a bank of coils on the back of the motor

**Brian Raymond** · 05-14-2003, 11:21 PM

I am getting conflicting statements, if it is carbureted it will not have a knock sensor or multiple coils. If the motor is a PCM ProBoss, we are getting closer.Brian Raymond