| Author |
Message |
    
scott walker
New member
Username: swalker
Post Number: 1
Registered: 08-2009
| | Posted on Wednesday, August 12, 2009 - 06:16 pm: | 
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I have a 86 46’ post with twin 6-71 ti 450 hp they run well a little black smoke at cruse.
Top rpm 2050 . clean bottom clean airsep intake new filters fresh fuel .what is the next step to rpm increase |
MARVIN PIERCE
Advanced Member
Username: marv
Post Number: 317
Registered: 09-2001
| | Posted on Thursday, August 13, 2009 - 11:59 am: |
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whats the n/l rpm set at? has top rpm always been 2050? |
scott walker
New member
Username: swalker
Post Number: 2
Registered: 08-2009
| | Posted on Thursday, August 13, 2009 - 06:00 pm: |
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This boat is new to me and has never made full rpm. The port engine shows a little black smoke and a bit weaker. 2050 rpm the starboard is nice and clear stronger.2175 rpm both run well.
I haven’t tried max rpm in neutral. What should I read ???? |
JOHN TUTHILL
New member
Username: jtuthill
Post Number: 3
Registered: 07-2009
| | Posted on Friday, August 14, 2009 - 01:51 pm: |
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671 TI SHOULD SPOOL UP 2500 RPM UNDER LOAD...BLACK SMOKE PROPABLY MEAN MUCH HOTTER EXHAUST...YOUR ENGINES WORKING TOO HARD AND TOO MUCH HEAT ON THE HEAD ISNT A GOOD THING....U NEED TO CHECK COMPRESSION, INJECTORS, AND PROPS TO GET HER TO SPOOL UP 2500RPM....TOUGH ENGINES BUT TOO MUCH HEAT ON THAT HEAD IS BAD.... |
scott walker
New member
Username: swalker
Post Number: 3
Registered: 08-2009
| | Posted on Friday, August 14, 2009 - 09:20 pm: |
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the props are 3 blade 24-26. what size is right |
