260 Merc Rev limiter?
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260 Merc Rev limiter?
i had this Nova 5 years ago. never pushed it hard. friend i sold it to built it up and saw 63 MPH at 5200 RPM's. i am pretty sure they are stock 260 Merc ignition systems. do they have rev limiters? and at what RPM?
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I would double check those numbers, if running 23 pitch like wellcraft put on them from the factory you are at 17% slip which is pretty high for a boat with twins.
Factory numbers by radar were 63 mph at 4600 rpms with the 23 pitch cleavers. (about 6%slip)
Factory numbers by radar were 63 mph at 4600 rpms with the 23 pitch cleavers. (about 6%slip)
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boat currently has 1 23 mirage and 1 21 mirage. he mighta been using those as he had a prop stolen. i have picked up another 23 mirage. anyway, does anyone know if 260 mercs had rev limiters? or did they use the inherent lack of balls as a rev limiter? or is it lack of irony?
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But I do agree that 6% slip on cleavers is optomistic, but...... I have two magazine articles on the boat from the original owner that state top speed as 62mph in one magazine and 63 in the other. It seems that they+ tested the same boat, at least based on the color scheme, and equipment package of the boats in the article.
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boat currently has 1 23 mirage and 1 21 mirage. he mighta been using those as he had a prop stolen. i have picked up another 23 mirage. anyway, does anyone know if 260 mercs had rev limiters? or did they use the inherent lack of balls as a rev limiter? or is it lack of irony?
If there are rev limiters, I've never hit 'em!
And I've been to 5400, briefly.
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Even with the few kinks I am trying to work out, according to the merc prop calc tool, I am at 7% slip running SS 21p 4 blade(same boat as OP). Speed from GPS.
But I do agree that 6% slip on cleavers is optomistic, but...... I have two magazine articles on the boat from the original owner that state top speed as 62mph in one magazine and 63 in the other. It seems that they+ tested the same boat, at least based on the color scheme, and equipment package of the boats in the article.
But I do agree that 6% slip on cleavers is optomistic, but...... I have two magazine articles on the boat from the original owner that state top speed as 62mph in one magazine and 63 in the other. It seems that they+ tested the same boat, at least based on the color scheme, and equipment package of the boats in the article.
Last edited by A.O. Razor; 03-08-2012 at 05:48 PM.