88 17"3 bayliner cobra with force 125

[emmette79]

Hello I am a newbie to boating all together. Looking for info.. I took boat to mechanic last year to get boat running..that worked great..got it out on water with me my girlfriend and her boy with them sitting in front of boat it is hard to get on plane..my boat idles great no misses and has a 13 1/4 by 17 prop.. I am running 50:1 mixture and boat do...any ideases not leak in water.. I took and ran it in driveway shut it off and checked plugs seemed fine.. don't know what to check to see.. the boat is not even turning 4000 elms.. should b around 52 5500 rpms.. I. Pulled plug wires off while running and the first one ran differently the second didn't really change how ran but heardit sparking..third and fourth wires came off it died...

 

[pnwboat]

Re: 88 17"3 bayliner cobra with force 125

Check the compression on all cylinders.

Check the spark with an inline spark tester like one of these. You can adjust the gap that the spark has to jump which is helpful in diagnosing a weak spark.

http://www.amazon.com/Thexton-404-Adjustable-Ignition-Tester/dp/B0002STSBM/ref=pd_sim_auto_1

 

[emmette79]

Re: 88 17"3 bayliner cobra with force 125

J

Check the compression on all cylinders.

Check the spark with an inline spark tester like one of these. You can adjust the gap that the spark has to jump which is helpful in diagnosing a weak spark.

http://www.amazon.com/Thexton-404-Adjustable-Ignition-Tester/dp/B0002STSBM/ref=pd_sim_auto_1

Yes thank u for responding earlier... I went checked compression and all were 135... checked spark with tester and all were firing great.. checked plugs and all were firing great also..any more suggestions...thanks

 

[foodfisher]

Re: 88 17"3 bayliner cobra with force 125

Look for uninvited passengers, For example, water in the bilge, water soaked foam.

 

[pnwboat]

Re: 88 17"3 bayliner cobra with force 125

Also make sue the throttle plates on the carburetors are opening up all the way. The throttle plates should be perfectly horizontal at WOT. It seems that the top two cylinders are not working like they should be? Maybe something wrong with the top carburetor?

It's sometimes difficult to judge the spark visually. Maybe swap the two CD modules around and check the motor at idle again to see if the symptoms change when you pull #1 and #2 plug wire off.