I blew up my 200HP 1997 Johnson Venom and I'm replacing it with a rebuilt 200HP 2000 Johnson with 120 hrs on the rebuild. What are the performance differences between the two motors? Should I expect better fuel efficiency? More power? etc...
I blew up my 200HP 1997 Johnson Venom and I'm replacing it with a rebuilt 200HP 2000 Johnson with 120 hrs on the rebuild. What are the performance differences between the two motors? Should I expect better fuel efficiency? More power? etc...
If you always do what you've always done, you'll always get what you've always gotten.
Is it possible that my boat has a fuel line restriction that could cause a piston to overheat and fail? This is the second motor this boat has had blow up on it. The first was a 200hp 1991 Evinrude XP that failed back in 2003 or so. That one was the #2 piston as well. I just want to know what I'm doing wrong so I don't keep replacing motors.
If you always do what you've always done, you'll always get what you've always gotten.
Have you updated the drain plugs to the newer ones with a tit on 'em to keep the hi speed jets from backing out? Have you gone to the oversized jet for # 2 carb? MANY posts on her for those two fixes......
If you always do what you've always done, you'll always get what you've always gotten.
Popping a 91 on #2 and then a 97 on the same cylinder tells me you are either tweaked up a little bit too high, or you have something like a transducer/pitot or something within 18" of the centerline of the gearcase causing turbulated water. The 91's were an open deck design with power boost cooling so #2 was not apt to pop unless the motor was way too high or the LU got air. I can see a closed deck block doing that 93 and up. But there are TSB's out there to cure the issue on #2 going. If it was me, I'd drop it down a 1/4-1/2" and not worry about it. You may loose 1 MPH but is it worth the cost of a rebuild? Don't let the pressure drop below 18 PSI full trim WOT in turns and you'll be fine. I like to see them ~23 PSI.
I apologize for being so ignorant with this and you probably have to explain this suff a billion times. But I don't know what you mean with a lot of what you said
<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by ChampioNman »</td></tr><tr><td class="quote">The 91's were an open deck design with power boost cooling </td></tr></table>
I don't know what that means at all.
<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by ChampioNman »</td></tr><tr><td class="quote">But there are TSB's out there to cure the issue on #2 going.</td></tr></table>
What is a TSB?
If you always do what you've always done, you'll always get what you've always gotten.
A TSB is a Technical Service Bulletin put out by the manufacturer to correct issues. In this case they put 2 sizes larger High Speed Jet in the #2 carb to aid in keeping the piston and cylinder cool.
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