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Formula 242 not up to snuff.

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Formula 242 not up to snuff.

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Old 05-24-2016, 09:23 AM
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I ran into a very similar issue and it ended up being a hairline crack on one of my spark plugs.
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Old 05-25-2016, 07:55 PM
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I know the boat is solid. The previous owner replaced all the stringers and transom. This weekend we are going to go through it better.
Originally Posted by tpenfield
Check the basics as stated. Other things to check would be compression, cylinder leak test. If the engine has been run in salt water, I would do a cooling system pressure test to see if you are getting rust-thru around the valve guides or elsewhere.

Also, how's the structure of the boat? if it is wet/rotting, then the boat would weight a lot more, which can be the culprit.
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Old 05-25-2016, 08:42 PM
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I had a 85 272, throttle cables were stretched. This kept carbs from going wide open.
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Old 05-25-2016, 09:03 PM
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[I]s this his first boat ? Or first boat with trim ?
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Old 05-25-2016, 09:16 PM
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Originally Posted by SB
[I]s this his first boat ? Or first boat with trim ?
He had a 17' sunbird with 130hp alpha one. He ran that last year. This is his first performance boat. I am going to visit him this weekend. I am gonna run the crap out of it for him.
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Old 05-25-2016, 09:22 PM
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He said that's trimmed all the way up. I wonder if his trim limit switch is set real low. I'm gonna check into that. Maybe bump the trailer button while running it.
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Old 05-28-2016, 02:01 PM
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Solved!!! Choke was not opening 100%. That would not allow the secondaries to open at all.
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Old 05-29-2016, 08:50 AM
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Not Solved! (My boat)....Secondaries are opening and getting more RPM now but still wasn't able to hit 50....49 MPH@4800, trimmed about 3/4 (seemed like the best run, more trim and she dogged out) tabs up.

Fuel still maybe? Sittin about 1/2 tank of 1 yr old + go-go juice...

Timing was perfect (10 degrees)....79formula calculated me at 19% prop slip....HELP
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Old 05-29-2016, 11:34 AM
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How is the bottom, clean and smooth, no bottom paint? What is the diameter of that prop?
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Old 05-29-2016, 12:07 PM
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No bottom paint, smooth as a baby's ass however I did discover today that I have the Formula "hook". My buddy has had his removed so I think this is costing me some top end.

Running a 21p. Going to try a 21 plus in the next few weeks. I'm told this should yield a few mph
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