97 Johsnon 175 OR, Thought I Blew Her UP!!

HS91_Mike

Seaman
Joined
Feb 11, 2009
Messages
62
A 1997 Johnson 175 OR that I was running out in the channel and as I approached the No Wake Zone, I throttled down. However, I couldnt throttle down below about 3500 rpms. I slipped it into neutral. But the throttle plates were still open and the engine pegged out to about about 7000+ rpms for a second or two until I killed the ignition. Turns out that an airbox hose was rubbing against the throttle linkage and caused them to stick open.

Ran the boat about 20 mihnutes thereafter with no probems. The motor sounded a little different after the fact. Is it likely that this would have damaged the engine psitons, rings. I know the question is open ended, but is there anything I need to double check prior to running this boat 20+ miles offshore?:facepalm:

Mike
 

trendsetter240

Lieutenant
Joined
Jun 22, 2009
Messages
1,458
Re: 97 Johsnon 175 OR, Thought I Blew Her UP!!

You should run a compression check at a minimum to ensure that nothing was damaged. It's possible that could've caused some damage but if it was only for a few seconds you may be ok.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 97 Johsnon 175 OR, Thought I Blew Her UP!!

What do you mean by " sounded different " ??
 
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