Alpha one gen 2 stalling out

[Pturner1991]

Ok so here's the deal I purchased a 1996 glastron with a mercurial 4.3 v6 alpha one gen 2 about a month ago when I first get to the lake the boat runs great until reaching a temp of 150 f then it starts to dog out if I'm running 4000 rpm it will drop to 1500 then pick back up if I continue driving it the problem only gets worse to the point that I can only drive it for a 30 seconds on a low rpm then it dies fuel pump is not hot in fact the whole motor runs pretty cool to the touch no alarms are going off when this starts to happen so far I have replace the impeller in the lower unit both gaskets rubber grommet and plastic guide tube the impeller wasn't in terrible condition I could have probably used it tell next year I also replaced the fuel pump screen in carb and fuel filter I have a water temp sensor on its way right now but I'm running out of money and things to replace so if any one has some suggestions please let me know I'm in desperate need of help!!

 

[Pturner1991]

Btw when I cleaned all the fuel lines out I saw nothing abnormal every thing looked clean

 

[mjf55]

Pturner, I cannot help you specifically, but this post is in the 'other outboard' repair section. Ask the mods to move it to the Mercruiser Sterndrive section and you should get more traffic ( and help)