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Old 26 February 2021, 10:35   #1
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Mariner engine

Hi guys hope you are all ok I have a mariner engine which I was thinking of putting on a sib the problem is how ever my shaft length is 18 inches or so and I don’t know what sib my motor would be comparable with I was thinking about getting a quicksilver 420, thanks
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Old 26 February 2021, 15:01   #2
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Originally Posted by Dumbo View Post
Hi guys hope you are all ok I have a mariner engine which I was thinking of putting on a sib the problem is how ever my shaft length is 18 inches or so and I don’t know what sib my motor would be comparable with I was thinking about getting a quicksilver 420, thanks
That'll be an ex rnli special length 18" shaft, neither long nor short(standard) personally I'd look at longshaft boats & be prepared to cut an inch or two out of the transom , you can often run quite high so worth a try without cutting but realistically you start to have ventilation problems after lifting the av plate over 1.5-2" above keel line .
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Old 26 February 2021, 15:17   #3
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ThanKyou very much I thought this would be the case I am trying to get hold of the dealership to see if they can give me the exact transom height before I buy one as on the website it’s state it as it needs a long shaft hopefully it shouldn’t be to much of a problem are these rnli 18”outboards quite common ? If so what do they tend to get used on ?
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Old 26 February 2021, 17:56   #4
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Country: UK - Scotland
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Originally Posted by Dumbo View Post
ThanKyou very much I thought this would be the case I am trying to get hold of the dealership to see if they can give me the exact transom height before I buy one as on the website it’s state it as it needs a long shaft hopefully it shouldn’t be to much of a problem are these rnli 18”outboards quite common ? If so what do they tend to get used on ?
Some sibs have quite short transoms for their qouted size so you might get away with it if your lucky
Think they came off the d class boats & yes a fair few about
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Old 01 March 2021, 09:54   #5
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I spoke to the dealership they said a seapro 420 would be the better option, if these 18inch shaft motored are quite common what are people using them on ?
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