Why to replace exhaust Manifolds

[Capt Rick]

I have found on wakeboard boats if you don't keep fresh spark plugs changed each year you can get a misfire from excess fuel in the the exhaust manifold the backfire or ping will cause the fuel to ignite and the vibration of the exhaust can cause a crack in the exhaust tube.
Next is water in the exhaust valve and misfire or worse throw a rod, pit the top of the piston and head.

I have seen manifolds go bad at 1100 Hours in fresh water.

Capt Rick

[Capt Rick]

1710450130   Manifold,Exhaust,SS,Starboard           738.88    $30.00     
1710550130   Manifold,Exhaust,SS,Port           743.73    $30.00

Reuse exhaust gasket or buy aftermarket ones

[elgringo-inaz]

Old Thread here....Capt Rick,

Can you tell me part number for aftermarket exhaust Manifold gasket?

Will this work?

https://www.amazon.com/Fel-Pro-MS-94754-Exhaust-Manifold/dp/B000C2ALKU/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1501430452&vehicle=1999-75-1003-20--1-6-7-3977-1783--1-1895--18-0&sr=1-1-catcorr&ymm=1999%3Alexus%3Als400&keywords=Fel-Pro+MS+94754

[Capt Rick]

It Looks correct but no way to tell.

Capt Rick