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Thread: Little Jet Boat engine Swap
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12-01-2004, 08:25 AM #1Member
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Little Jet Boat engine Swap
Remember the crazy several years ago all the 14-16' jet boats. Well I am looking at one but it has a seized 90 hp Merc head it it. Can I swap it out with a larger one. I see some that have the V-6 260 hp Merc Head. Any info would be helpful.
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12-01-2004, 08:35 AM #2
Nope, won't swap. The 90's were Force powerheads and nothing interchanges with the Merc V6 stuff. The best you could hope for is finding a complete jet package and whackin the boat and putting the whole thing in it.
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12-01-2004, 11:15 AM #3Member
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So if I find one with a Merc 115 or 120 I could swap in the bigger motor?
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12-01-2004, 12:15 PM #4
I'm not sure I understand the question, but none of the V6 stuff interchanges with the smaller stuff. I'm unfamiliare with Merc Sportjets between the 90 and 175, so I don't know if there's any interchangeability for the 90 and 115 or 120. I didn't know they made the latter 2, so I don't know what powerhead they're based on.
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12-01-2004, 12:22 PM #56000 RPM
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12-01-2004, 12:49 PM #6
The 175 is a 2.5. I have one of those now. There are also some bigger ones in both 2.5 and 3 liter configurations. I think the big 2.5 is a 225, but it may be 240.
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12-01-2004, 02:14 PM #7
Raceman what is the biggest downfall to the sportjet concept, why did it pretty much die and why are boat with this setup so cheap to buy used compaired to a standard outboard model. (for my example compairing the price of a 15' std whaler to a 15' whaler rage) thanks in advance for any input.
boomer sorry for the hi-jack but I think it is somewhat revelant to what you are trying to do22' Activator w/ 250xs Merc Opti, back home again
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12-01-2004, 02:28 PM #8
I don't know. There must be a lot of em still being sold around here based on dealer's inventories. The SeaDoos have had Merc Sportjets in them for a couple of years now. I don't know if that changed with the Bombardier/OMC deal. I've got a Sea Ray F16R with the 175 Merc Sportjet and it's a great little boat. Except for Merc's insane plastic oil pump gear that cost me a powerhead at 8 hrs (out of warranty by age) I have no complaints with mine at all. They're a bunch of fun and will do so much stuff that a PWC won't.
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12-01-2004, 02:39 PM #9Member
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I sell the SeaDoos, some have mercs, some have Rotax engines.
The Rotax four stroke seems to be the way the squirt boats are going.
They are a popular boat, we sell a herd of em.
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12-01-2004, 03:31 PM #10
I thought about it after I typed it, I guess the market really didn't go away, just changed. Remember when every manufacture had a little sport jet boat (including whaler), none of them do anymore, but now most of the PWC manufactures have boats, some bigger ones with twins as well. So I knd of worded my eariler post incorrect.
Just think it is interesting that a 15' whaler rage is about half the price of a 15' whaler supersport22' Activator w/ 250xs Merc Opti, back home again
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07-23-2019, 04:12 PM #11New Member
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Anything can be done if you have time and money I have 1996 Dynasty Storm Jet Sport had 120 HP Merc that we're Chrysler I don't want put 125 Mercury that has been orphan and hard get part for it. I'm doing the planing now for some kind car engine
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11-12-2019, 02:29 AM #12Junior Member
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I currently have a 175 and needed a new power head so I used an older 175 outboard and got an 8 spline driveshaft manufactured (Sportjet powerheads are very hard to find in Aus). Now however I am looking at upgrading to a new 200 Sportjet. I am assuming that they're the same size hole for the installation... is that correct?