Harris Marine Forum

Harris Marine Forum - Tech Questions

1. 
   NoviceMatt
   

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   Joined: Oct '09
   Posts: 3

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   Hi I am having a few issues with getting the most out of my motor / jet combo. I have a 4.2M Aitcheson hull with a Ford 302 in it matched to a 773 with a Scott nozzle. The original combo was a 18 front followed by two 19's and a 96mm nozzle. This really struggled to get out of the water so changed the front impellar out to 21 and left the two 19's in behind it. Initially left the nozzle at 96mm, certainly got out of the water a little better but not by that much, revved out to 4000rpm. Then decided to pull the liner right out and opened the nozzle right out - this helped a little more, rev's out now to 4600rpm and does about 75KM on GPS. What I am after is more perormance right out of the hole. The engine almost seems to free rev right up to 4000rpm then sit till the second barrel comes in on the holley before the boat really gets out. What are your thoughts as to how I can get a better match?

   Thanks
   MAtt

   Posted 14 years ago    #                  

2. 
   Mike
   

   Moderator
   Joined: Jul '08
   Posts: 1,924

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   Hi Matt, Are the impellers all std hamilton ones? Do you have a pic?

   Mike

   Posted 14 years ago    #                  

3. 
   NoviceMatt
   

   Member
   Joined: Oct '09
   Posts: 3

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   Hi Mike, Yep all Standard Hamilton impellars, brass with stainless tips all recently sharpened and tipped.

   Thanks
   Matt

   Posted 14 years ago    #                  

4. 
   Mike
   

   Moderator
   Joined: Jul '08
   Posts: 1,924

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   You realy need a bullet impeller in the front, they are the best upgrade you can do and they are 100% guaranteed to work or we take them back. A stainless one is $695+gst.

   Mike

   Posted 14 years ago    #                  

5. 
   NoviceMatt
   

   Member
   Joined: Oct '09
   Posts: 3

   Currently Offline

   Hi Mike can you please send me down a bullet, best address is probably care of

   Mt Difficulty Wines
   Felton Road
   RD2
   Cromwell

   Thanks

   Matt

   Posted 14 years ago    #                  

6. 
   Mike
   

   Moderator
   Joined: Jul '08
   Posts: 1,924

   Currently Offline

   Hi Matt give us a call at work. 033270923 and Dawn will organize for you

   Mike

   Posted 14 years ago    #                  

7. 
   xiaofeng
   

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   Joined: Dec '12
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8. 
   smith025
   

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   Posted 11 years ago    #                  

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