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11-23-2009, 05:22 PM #61
A problem like that is nothing compared to what happened with the Fitch motors. It wasn't a matter of being a poor match for the use, the early Fitch motors actually self destructed in some applications and cost OMC a ton of money in warranty claims.
I know there are some different drive set up choices between the motors, but I am unaware of significant differences in powerhead porting or compression between the motors.
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11-23-2009, 07:23 PM #62
Some engs have different ecu mapping for applications.
I think what killed alot of Fitch was running right around near the transition point where it goes from burning in the pocket to across the whole piston face. Trolling was a big problem for them sooting up everything. A friend of mine at that time worked at an Evinrude dealership that did alot of bass boats and they never had any problems with the first Fitchs they sold. Like you said, light boat and no trolling, just idle and WOT running pattern. Whats funny to me is I have ran 2 etecs a 225 and a 250 HO and both had stumbling around 1200 to 1500 rpm. From what others have told me is every etec has a bad spot you dont just hold it at. I think the optimaxes have figured all that out better than the etec engs. Opti is smooth thru the whole range.
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11-23-2009, 07:46 PM #635000 RPM
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I know there are some different drive set up choices between the motors, but I am unaware of significant differences in powerhead porting or compression between the motors.
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11-23-2009, 08:03 PM #64
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11-23-2009, 08:46 PM #65
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11-23-2009, 08:51 PM #66
As far as Etec, I have always heard that the 250 HO is the same powerhead as the 300 offshore eng. I would imagine the ecu mapping would be slightly different between those to though. The Yamaha hpdi 225 bass eng and the 250 offshore version were the same eng also. I have never checked to see if their ecus are a different part number for sure but I believe they are.
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11-23-2009, 08:56 PM #67
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11-23-2009, 09:12 PM #685000 RPM
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11-23-2009, 09:48 PM #69
[QUOTE=stan merck;1835454] The Yamaha hpdi 225 bass eng and the 250 offshore version were the same eng also. [QUOTE]
The 225 and 250 have different blocks...they are ported different. The 200 and 225 share the same porting though.'08 SRV
Yamaha 3.1 Phase III
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11-24-2009, 09:17 AM #70
[QUOTE=DoktorC;1835530][QUOTE=stan merck;1835454] The Yamaha hpdi 225 bass eng and the 250 offshore version were the same eng also.
The 225 and 250 have different blocks...they are ported different. The 200 and 225 share the same porting though.
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11-24-2009, 10:07 AM #71
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11-24-2009, 11:31 AM #72
[QUOTE=DoktorC;1835891][QUOTE=stan merck;1835841] Honestly, I forgot about the VZ200 and VZ 225 being the same block. I always thought the 200 was a strong 200! Yeah, the Z250 was kinda wimpy, roughly about 245 hp at the prop. Now I'm thinking what is the difference in the VZ 200 and 225 to detune it?