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Dec 30th, 2023
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 Replaced Power Head
#10816782
05/04/15 01:54 PM
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Joined: Feb 2011
Posts: 27,410
Der Vorsteher
OP
TFF Guru
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OP
TFF Guru
Joined: Feb 2011
Posts: 27,410 |
I am looking at a used boat that is a '99 200 Yamaha Vmax EFI. It has had a new power head installed with the phase 2 kit. Is this something that I should be leary of? I don't know much about the inner workings of the engines.
Team Wolfs
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Re: Replaced Power Head
[Re: Der Vorsteher]
#10817035
05/04/15 03:16 PM
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Joined: Jan 2014
Posts: 198
HoustonCatfisher
Outdoorsman
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Outdoorsman
Joined: Jan 2014
Posts: 198 |
Phase 2 kit is a performance modification kit. It usually has higher compression head and other things to boost horsepower.
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Re: Replaced Power Head
[Re: Der Vorsteher]
#10817088
05/04/15 03:35 PM
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Joined: Nov 2007
Posts: 5,528
ssmith
TFF Celebrity
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TFF Celebrity
Joined: Nov 2007
Posts: 5,528 |
higher compression means more power until you get some less than quality fuel an then you are back to rebuild time.
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Re: Replaced Power Head
[Re: Der Vorsteher]
#10818530
05/05/15 12:25 AM
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Joined: Aug 2008
Posts: 8,500
bigtexnick
TFF Celebrity
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TFF Celebrity
Joined: Aug 2008
Posts: 8,500 |
I would probably have it checked out by a mechanic just to double-check the repair job was done correctly and there are no latent issues.
--Nick 
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Re: Replaced Power Head
[Re: Der Vorsteher]
#10819006
05/05/15 03:30 AM
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Joined: May 2013
Posts: 955
JoeFriday
Pro Angler
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Pro Angler
Joined: May 2013
Posts: 955 |
The real question would be what made the first Powerhead pop. If that wasn't fixed, then it could happen again. The 0x66's are pretty tough. Is it a Hydrotech phase 2 kit? Who did the work? What other documentation is there for all the maintenance stuff? When was the last time the injectors were cleaned and calibrated?
This space for rent
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Re: Replaced Power Head
[Re: Der Vorsteher]
#10819662
05/05/15 03:00 PM
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Joined: Mar 2011
Posts: 14,201
Bandit 200 XP
TFF Guru
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TFF Guru
Joined: Mar 2011
Posts: 14,201 |
OX66's are very good motors.Have a good Yamaha tech check it out.
Triton 200 XP
200 Yamaha 0X66
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