-
How do I get my speed back??? after rebuilt power head
OK just had my 10 hour check up after having the power head re-built. I have 2004 mercury XR 6, 150 running a 23P tempest plus prop with all the plugs in it, all cylinders had 125 compression with new spark plugs. The boat is a TR 185. So yesterday I took her and let it rip... With the jack plate up and the motor trimmed up I was only getting 47 miles per hour and 49000 RPM, WOT; what should I be at? One thing that did change during my rebuild is I went from a 6 inch manual jack plate to a 8 inch hydraulic . Prop is the same. Before the motor started to go down I was getting 58 MPH then it went to 54 then I got the rebuild after a cylinder went down.
Last edited by johnnyboydan; 05-18-2020 at 06:19 AM.
Johnnyboydan
Triton 185 Merc 150
-
Need to raise that engine, you added 2 more inches of set back, means you can come up about an inch or more.
-
Member
Go back to the 6 inch. My 21x looses like 4mph with an 8 inch set back. I've had 4 different engines and plates on mine and the 6 is the fastest