Merc 260 wont get WOT

[paragod]

I have a Merc 260 that runs great brand new rebuild it had an older MR that blew up I put a new 1984 drive from a 228 merc I think it is an alpha 1 any way took the boat out and it wont make more than 3800 rpms carb is wide open and its running great but need more rpms shes drinking the fuel and working to stay on plain it has a 15 3/4 17 p alum prop From the prop guide for this drive and engine it looks like the dia of the prop is to big any suggestions would the smaller dia fix this its a 23ft 233 LS Formula

 

[soh_ii]

Re: Merc 260 wont get WOT

You may want to try less pitch on your prop.<br />It sounds like the problem I recently had, which I lowered the pitch from 19 to 17 and WOT increased.<br />Hope it will work for you

 

[BMDODGE]

Re: Merc 260 wont get WOT

do you know the gear ratio on the new drive ???<br />the old one ??? sounds like there maybe a difference and that could be the culprit. changing the prop should help some. what was WOT RPM'S with the old drive ???