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Fountain 525SC Engine oil inquiry and flame out motor issue

Old 04-30-2021, 01:17 PM
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Default Fountain 525SC Engine oil inquiry and flame out motor issue

Hi all, i have purchased a 1994 Fountain Lightening with stock Twin 525SC (454cid). I cant find what oil is recommended for this motor but previous owner used straight SAE 40. I was thinking of converting to 25w40 or maybe an Amsoil. Anyone have a suggestion for oil types? Motor has 725 hours and not raced just used for cruising. Also i occasionally get flame outs approaching dock at low rpm. I have changed all cap and rotors and wires and had both carbs professionally rebuilt. Still have flameouts and was told by someone to change electronic chip from a v8 to v6. Has anyone heard of this?
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Old 04-30-2021, 03:49 PM
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Please describe what you mean by flame outs.
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Old 04-30-2021, 04:16 PM
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I started doing 10 setups every time someone started an oil thread



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Old 04-30-2021, 04:30 PM
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NIce abs speedy ! lololol
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Old 04-30-2021, 04:34 PM
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525scs have performance (crane) flat tappet cams. An old fashion zinc loaded oil is recommended. 40w is fine. So is 20w-50.
My go to is still Vavoline Racing VR-1.
Here is a really good deal on it:
https://www.amazon.com/gp/aw/d/B07ZCQZ771 https://www.amazon.com/gp/aw/d/B07ZCQZ771


Last edited by SB; 04-30-2021 at 04:38 PM.
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Old 04-30-2021, 04:36 PM
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Originally Posted by ThisIsLivin View Post
Please describe what you mean by flame outs.
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Old 05-01-2021, 12:16 PM
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OP the selection of oil to run IMO would be the water and ambient temps that you run in, Im not a fan of straight weight oils, Im in the midwest and have always ran VR1 20-50 in all my marine engines
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Old 05-01-2021, 12:55 PM
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then don't visit a 2 stroke jet ski forum. every summer we get 200,000 new 'what kind of oil' threads.
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Old 05-01-2021, 08:28 PM
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the v6 module was a common swap back in the day . it gives them more advance at idle. that helps them from dyeing when docking. they were notorious for fouling plugs and were hell on coils. but you couldnt break them !
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Old 05-03-2021, 09:56 AM
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Motor shuts down,
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