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#1
04-20-2005, 12:33 PM
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Indmar Tune-Up/Timing Procedures
The attached is something that some of you might find useful. It contains Tune-up and Timing procedures for Indmar Marinized Ford and GM engines through the 2005 Model Year. I hope thr PDF attachment works. This is the first time I have tried making an attachment.
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Engine Nut Indmar Marine Engines Power to the Sport 
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#3
04-20-2005, 12:42 PM
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Rock on, ENut!
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Previous: 1993 Prostar 205 Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG. FAQ Tyler Ski Club To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.
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#7
05-15-2005, 03:58 PM
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Quote:
Engine nut
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Engine Nut Indmar Marine Engines Power to the Sport
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#8
05-16-2005, 08:09 AM
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  THANK YOU!
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If one day you're asked: " How did you spend your time here on Earth?" Will you say: "I kept a crabgrass free lawn" It's time to SKI. 
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#9
05-16-2005, 08:17 AM
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I'm cornfused....
In an earlier post - you stated: "The switch over to GM Vortec heads came back in 95-96 model year era. The vortec heads allowed the engines to breathe more efficiently and resulted in a HP increase of approximately 40 HP. For example, the original Indmar TBI was approximately 275 HP, when the Vortec model came out, the HP bumped to closer to 315. You can easily tell if you have Vortec heads on a 5.7 by looking at the bolts that hold the intake manifold to the cylinder head. On a Vortec engine, there are 8 intake manifold bolts that go straight down into the head. A non-vortec engine has 12 intake manifold bolts that go in at an angle. " Yesterday, I counted my intake bolts on my '95 PS190, Elect ignition (not a points convert either). I counted 12, meaning that i'm non-Vortec. However, your .pdf only states Vortec for any 5.7 that's electronic non-LT1. Is there another way to tell if I'm Vortec or not? I'm starting to think I'm using shorter plugs than I should be?
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If one day you're asked: " How did you spend your time here on Earth?" Will you say: "I kept a crabgrass free lawn" It's time to SKI.
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#10
05-16-2005, 08:28 AM
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I think I'm in the same boat. My '97 is a 275 HP non- HO electronic ignition, non-vortec...I think. I ordered new plugs from MYMC and they sent me the long ones, luckily I checked them against the ones I pulled out which were much shorter.
The only optional engine that year was the LT-1.
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'97 PS 205, Green, 275 HP, Skylon, Hewitt Boat Lift, Aquatic AV CD and Amp
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