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-   -   leak down test (https://www.offshoreonly.com/forums/general-q/290365-leak-down-test.html)

MILD THUNDER 01-22-2013 10:56 AM

Hopefully a roller lifter didn't come apart

obnoxus 01-22-2013 11:16 AM


Originally Posted by MILD THUNDER (Post 3853207)
Hopefully a roller lifter didn't come apart

Makes cool grooves in the cam,,,,,,wanna see !!!!??

1989mach1 01-22-2013 12:36 PM


Originally Posted by obnoxus (Post 3853219)
Makes cool grooves in the cam,,,,,,wanna see !!!!??

on your boat share...... on mine NOOOOOOO. lol lets hope it is some thing on the top end thats causing it because was planing to do them any way.... bought the boat with 345 hours and on about 15 or 20. didnt run as much trying to recoupe form buying the boat. with having near 20% leak down on some cylinders should i just go ahead and have them pull the heads any way and have them checked and new head gaskets a car guy told me that if the leak down is good just do the springs.

1989mach1 01-22-2013 12:41 PM


Originally Posted by riverrat (Post 3853209)
+ 100 ,keep us posted and pics.
Jeff A.

i will and i will take a camera with me this weekend when i go up to meet with him. and am going to have him save all parts changed. i am that guy that saves all the $hit and puts it on walls and what not :lolhit:.

1989mach1 01-22-2013 12:57 PM


Originally Posted by cig20 (Post 3853126)
this is some good reading and advice im having both test done leak down and compression
thanks for all advice will post results

Im glad that me takeing it from behind is helping you...:hitfan:
i might be rollin a canoe this year. lol maby some one can give me a pull to kelleys

28Eliminator 01-22-2013 03:38 PM

See what you find out this weekend. At 345 hours that motor should have a lot of life left in it. The leak downs at 20% when cold are not that accurate, but a good indication of no major problems. If you do anything with the heads, because you are half way into it, I would pull them to change head gaskets and do a quick valve job and springs to start off fresh.

1989mach1 01-22-2013 04:19 PM

i mainly wanted to do the top end becouse merc has it to be done every 300 to 350 hours. pluse with buying used its better to be safe then sorry. u never know how the outher guy drove the boat, he keept it mint and only put 324 (now that i looked back) hours on it in 11 years. but thouse could be hard hours.

cig20 01-26-2013 01:29 PM

ok did both test
compression 145-150 on all
leakdown all good but 1 leaking air below number 2 plug
could be this be a head gasket or a cracked head?

BUP 01-26-2013 01:57 PM

what was the leakdown #'s especially on # 2 just wondering since you hear air leaking around the head area.


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