HydroLocking 383 mercruiser

[bruceb58]

Re: HydroLocking 383 mercruiser

Replace your manifolds and risers and be done with it. Don't use your boat anymore until you replace them.

 

[alaska_av8r]

Re: HydroLocking 383 mercruiser

at least get them pressure tested.......

just fyi.....my water was not showing up right away it took at least a day to get enough to notice at first then quickly got worse.....

....you could try this but running the boat with water getting in there is not a good idea......drain all of the water from the manifolds/risers and get it off the top of piston......close the manifold/riser drains run the motor......drain risers/manifolds again quickly...........let boat sit for a few hours and see if you have water.....

 

[stinger222]

Re: HydroLocking 383 mercruiser

at least get them pressure tested.......

just fyi.....my water was not showing up right away it took at least a day to get enough to notice at first then quickly got worse.....

....you could try this but running the boat with water getting in there is not a good idea......drain all of the water from the manifolds/risers and get it off the top of piston......close the manifold/riser drains run the motor......drain risers/manifolds again quickly...........let boat sit for a few hours and see if you have water.....

I tried the above test...drained manifold.riser after runnning the motor for a few hrs. came back next day...stilll had water in #6 cyl coming out the sp plug...Its got to be the head. I did some research on the casting # on the heads and some have indicated that they were prone to cracking. weekend project is to swap in vortec heads and intake.

 

[stinger222]

Re: HydroLocking 383 mercruiser

dropped the head off at mach shop to have it checked for cracks...stay tuned

 

[blh1972]

Re: HydroLocking 383 mercruiser

replace manifold and riser on that side of motor...AT LEAST.
one manifold and one riser is cheaper than vortec heads.

 

[stinger222]

Re: HydroLocking 383 mercruiser

UPDATE!!! Had head tested, no cracks...checked #6 cyl wall again with flashlight....small 1 in crack about 1/2 in from top of deck. I'm really looking fwd to having to pull the motor and take it to the shop. Being it is a 383 stroker and only has 95 hrs on it, I'm going to take it to the shop and if their are no more hidden cracks, have them sleeve #6 cyl and get back on the lake.