2006 J14 with 1987 mercury 40 hp 2 stroke engine

[Will5505]

Hello good evening i want to buy a new prop which the one i have is a 13 spline 9x10p . I weigh 230 and the boat has center console a bench and the whole front storage compartments with 1 battery in the bench and one inside the center console. If i ride by myself i can get top speed of 35 , but when my wife and my son come with me thats an extra 375 pounds i go around 5 mph . My rpm are at 6000 . The engine just wants to take off but i feel that the boat is not advancing at all. What suggestions for speed does anyone out there have . I also installed trim tabs but didnt work . Clueless on what to do. Thanks

 

[Will5505]

I also wanted to add that when installing the trim plates i had water run out the holes i drilled , i completely drained these holes to the point i can lift the boat easly

 

[Sea Rider]

Welcome to Iboats,

Is the current prop the original one, say factory delivered ? if so seems already kaputt. Is tach in good working order ? Post some pics of trim plates to have a look..

Personally would start with a hub slip test to rule out being already kaputt and then going from there throubleshooting other things..

Happy Boating

 

[Will5505]

Checked the hub and is in good working order the prop is astainless one . I took it off and inspected hub and prop. Should i get a 11 1/2 x 13 pitch aluminum from michigan wheel that i saw around 65 dollars or should i get something else . The trim tabs that i installed are aluminum and angled to 45. This actually helped with aligning the boat and getting on plane faster when i ride by myself.

 

[Sea Rider]

OB's rpm is 6 K with you alone or with family ? Is OB sitting at the sweet transom height ? At speed if water flow passing under small splash plate or towards AV plate when combo is on plane with trim set to 90? ?

Happy Boating