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Old 07-13-2011, 12:18 PM
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Boat: 1994 Prostar 205
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Question Need part #s & Vac Hose size for LT-1 350

We were wanting to do a little research on pricing on these parts. We were told they could all play a part in a sluggish engine (sluggish in low RPMS, idles fine). Does anyone know these numbers by chance?

Also, would you happen to know the vacuum hose size (diameter)? Our boat is currently down at the lake and we have no way to check it.

These are the parts we are looking for:

Idle Air Control Valve
Map Sensor
Fuel Regulator
Throttle Position Sensor

Thanks.
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  #2  
Old 07-13-2011, 01:05 PM
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JLeuck64 JLeuck64 is offline
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Boat: 98 Prostar 190 Stars & Stripes, LT1
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I know this is not the answer you are hoping for... but may I suggest you pull the boat out of the water and take it to a repair facility? In the short term this will be the fastest and the least expensive way to solve your runability issue. Swapping out parts based on suggestion always costs WAY more than it should and also takes longer to find the cause. A good tech should be able to diagnose your problem accurately within just a little time ( ;
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http://www.mastercraft.com/photopost...er=2572&sort=1
Need LT-1 parts?
OIL FILTER: Factory installed is a Penzoil P23, Afta market brands, AC Delco PF-454 and a Fram PH-13 or PH-30 will work.
SPARK PLUGS: AC Delco MR43LTS (gapped to .040")
FUEL FILTERS: AC Delco 25171391 (pump inlet side)
89058397 (pump outlet side)
IGNITION WIRES: Call Inboard Online @ (877) 327-7175 and order part numbers 556010A (odd bank) and 556010B (even bank)
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  #3  
Old 07-13-2011, 01:43 PM
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Ideally, that's what we would do. The problem is, we live in BFE. No Mastercraft dealers for hundreds of miles and no boat mechanics for hundreds of miles. My machinist husband is a drag racer and has many mechanic friends and this is what everyone is suggesting. Yes it could be more expensive, but he works for an auto parts store and whatever we don't need, we send back. He'll install 1 thing at a time until it's fixed.

So if you know the part numbers, that would be handy so he could look it up on their computer. He can find many part #s. Just not sure which one our boat requires.
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Old 07-14-2011, 05:17 PM
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j.mccreight@hotmail.com j.mccreight@hotmail.com is offline
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I agree with jleuck but many parts have part numbers on them, this sounds dumb but did ya'll look on the parts themself, a LT1 is a LT1
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1989 MasterCraft TriStar 190 SE
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Old 07-14-2011, 05:37 PM
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Our boat is at the lake, 2 hours away. We were hoping to pick up the parts before we drove down there this weekend.

Thanks. We'll figure something else out.
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  #6  
Old 07-14-2011, 06:26 PM
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j.mccreight@hotmail.com j.mccreight@hotmail.com is offline
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call skidim 803-345-0996 http://www.skidim.com/default.asp they have good parts reference its prolly your best bet
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low rpm, lt-1, parts, sluggish engine

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