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Post by mdaniell on Nov 23, 2009 1:40:09 GMT -1
Shawn I have a 1999 TR-18 with a 150 johnson, 14.5/24 raker prop and a 6" CMC jackplate. When I bought the boat it didn't have a jackplate and was a handful to drive. I added the jackplate and basically eliminated the chinewalking. Now my prop blows out and i lose all bow rise. It did this without the jackplate but no where near as bad. If I am running full throttle it won't blow out but as soon as i let off even just a little the bow falls and I lose all bite. By the way I am running it at 2.5" below pad and still have 22psi water pressure.
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crizzel
Executive Member
Posts: 1,213
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Post by crizzel on Nov 23, 2009 2:00:43 GMT -1
Does it blow out at high RPM? Or when you first take off?
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Post by mdaniell on Nov 23, 2009 11:51:37 GMT -1
it comes out of the hole like a rocket it has no slip at all
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Post by pbmang on Nov 23, 2009 13:13:08 GMT -1
Are you trimming down as you take your foot off the gas? Depending on the motor/boat configuration, you may have too much positive trim as you are slowing and that is causing the prop to lose bite. My Ranger was terrible about doing it.
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Post by jusmangrum on Nov 23, 2009 15:53:23 GMT -1
I would say the plate is to high. Even though you have plenty of water pressure I would drop the plate to 3.25 and try there and see what happens.
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crizzel
Executive Member
Posts: 1,213
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Post by crizzel on Nov 23, 2009 17:01:58 GMT -1
Im running a 14.5 x25p temptest plus on my merc 150 efi... good hole shot an good top end GPS its runnning 65.4 at WOT.. The only time its blown out with me if i was doing a tight turn with the motor trimmed all the way up... Did you measure to see where the motor was with out the jack plate below pad? You could call triton an see how many inches below pad they reccommend
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Post by Bob Smith (Porko) on Nov 23, 2009 22:18:43 GMT -1
I would say the plate is to high. Even though you have plenty of water pressure I would drop the plate to 3.25 and try there and see what happens. ditto this one, Matt! What is your RPMs at WOT trimmed all the way? You may need to go up in pitch as well. |
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Post by mdaniell on Nov 24, 2009 1:58:13 GMT -1
One person half tank of fuel it turns about 5500-5600 at wot.
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Post by bremenmarine1shawn on Nov 24, 2009 2:22:23 GMT -1
remeasure the engine heght,trimdown when u slow down.what type of prop are u running,and are u doing this with fishing load? thanks shawn
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Post by jusmangrum on Nov 24, 2009 3:31:18 GMT -1
Thats the right prop for that boat and motor. I would have the tach checked. When you said in your 1st post I put a jackplate on it and eliminated chinewalk and now blowing out, all that happened is you lifted the motor so high that your getting more slip instead of bite. Thats how the chinewalking went away ( less bite ) But you should be turning more rpms. You also said it did it before the jackplate but not as bad. Makes me think you have some hook somewhere in the pad. I used to have the same boat with a merc 150 efi. Triton Mike used to have one also. Mine would run 65 gps tournament loaded and it was a handful to drive. But if it is not walking it's not running. I've setup hundreds of boats and would be more than willing to meet you at the lake sometime to look at it and help you with the setup.
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Post by oldfishinfool on Nov 24, 2009 21:07:07 GMT -1
i have the same boat and 5500 is max rpm for tha engine, if you run it over that alot and you want have to worry about the set-up. oldfishinfool
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Post by mdaniell on Nov 25, 2009 21:36:51 GMT -1
Thanks for all the info guys, I will drop it down some and start fighting it again.
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