Had a Rocker Fail
#1
Gold Member

Thread Starter

My luck - had a Rocker fail. 2.5 hour cruise home on one motor. Naturally, the motor with Power Steering.....
3600 RPM, just cruising along and BANG. Motors probably only have 25 hours on them. Any thoughts other than just pure bad luck?
(Actually, I feel pretty lucky since there doesn't appear to be any damages other that the clean break on the rocker)


3600 RPM, just cruising along and BANG. Motors probably only have 25 hours on them. Any thoughts other than just pure bad luck?
(Actually, I feel pretty lucky since there doesn't appear to be any damages other that the clean break on the rocker)



Top Answer
08-24-2020, 07:19 PM
Gold Member

Thread Starter

So thought I'd just throw this out there as an update in case anyone is ever searching, but quite a few of the adjuster nuts were WAY over-torqued by my estimation. Didn't see any other noticeable signs of damage on any other rockers. I did note that almost all of the adjusters we're about 2.5 turns out but the recommended range is 1/4 - 2 turns.
Anyways, back together and back on the lift, hopefully to see out the summer...... Little guy getting some driving time in......

Anyways, back together and back on the lift, hopefully to see out the summer...... Little guy getting some driving time in......

#2
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Jesel's?
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SB (08-09-2020)
#4
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25 hrs on the rockers also? They do have a life span. Aluminum fatigues vs steel. I've seen a couple Jesel rockers broken like that, but they were pretty old and decent amount of spring pressure.
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hogie roll (08-10-2020)
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OldSchool (08-13-2020), Twin O/B Sonic (08-09-2020)
#10
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Wouldn't that have happened sooner than 25 hours? Those Jesel rockers just suck. I've had a bunch of them break on a previous boat... with hydraulic lifters. The other engine in the boat (new build) had the same cams and lifters and Crane Golds. No issues...
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Twin O/B Sonic (08-09-2020)