5.7 wont get to wot

[Lake time]

i have a 1985 murcruser 300 tempest this weekend it ran great for an hour at 3800 rpm and she started sputterng and cant get it above 2500 rpm and i smelled gas when that hapend 4 plug wires are a bit losse the last time it had a tune up was 05 so this weekend im doing plugs, wires, cap, rotor, and coil is ther anything eles i should look at welll im at it that may caues the same issues

 

[Lake time]

or could it be bad gas or ethenal in the gas

 

[alldodge]

Not reaching WOT and smelling gas, my first thought is the carb is flooding, but can be many things, need some testing

 

[Bondo]

is ther anything eles i should look at welll im at it that may caues the same issues

Ayuh,.... The fuel filters,....

Ya got a fuel delivery issue, not an ignition issue,...

 

[Lake time]

wher should I start first time working on something this old

 

[Lake time]

I'm honestly leaning on tune up of the ignition system because I was looking at the fuel pump and I found a plug wire haning and I pulled a plug wire off and the plug was broken I got half of it in the wire and the othe was in the motor hahahahah

 

[alldodge]

wher should I start first time working on something this old

Compression test to determine health of the motor (more then 110 psi with throttle held at WOT and 4 revolutions minimum)
Check/replace filters if they have not been changed. Check contents of filter
Check timing

Then go to the Adults Only section and review thru the thread about not reaching WOT

 

[Oshkosh1]

Ensure your exhaust flappers are still intact and one hasn't come loose and plugged one side.