My new prop came today!!!!!!!!! With excitment i went to the river........Only to find the same top speed and just a little difference in the speed of plane....Due to my recent post you guys helped me figure out my motor was way overpropped 87 bayliner capri 15.5 foot with a 87 85hp force.....It had a 12 5/8" 21pitch prop when i got it.... From the prop forum i figured due to the load and basically always pulling a tube i opted for the 13" 17 pitch prop instead of the 13" 19pitch that was stock..........So I guess there is more of a problem!!!! With both props I can only pull 31-32mph (GPS) with two adults and a six pack nothing else......I tried all the trim angles on the manual tilt motor for both props no difference except the hieght of the bow......The motor seems to run fine just no speed....... I dont have a tach right now waiting for my tiny tach.......So no WOT RPM......Changed plugs compression 122,125,119 Spark is good on all three cranking on starter all the plugs read mostly the same alil black fouling squeeze bulb is firm so i think it is not a fuel supply issue......Carb butterflies are opening totally but when they do is seems to bog down so i back off just a tad and perfect well for 31-32mph... No other problems I can see just slow and shouldnt the prop make atleast a couple mph differnce on WOT? Going tubing in the morning would like to try something while i wait for the ol lady to get up in the am any ideas?????
