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Thread: 1988 Black max 200hp overheating
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05-23-2024, 09:24 AM #16
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05-23-2024, 07:16 PM #17Member
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Og787233
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05-27-2024, 08:09 AM #18Member
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So I’m guessing it’s a 1987 then?
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05-27-2024, 11:50 AM #19
So were there no numbers or letters behind the timing arm?
RockTeam Junk
No sparkling wiggles in here, only dump truck grinches.
"Screamin Heathen"
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05-27-2024, 01:18 PM #20Member
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LakeFever liked this post
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05-27-2024, 01:41 PM #21
Lucky bastard that’s a 225 promax block. Gotta run the good fuel in that one. No ethanol 91 oct minimum. Might want to pull a head, cc it and measure the head gasket thickness. Could be your issue right there
Hydrostream dreamin
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05-27-2024, 01:49 PM #22
Does look like an NN stamp. Can you show a pic of the side of the engine.
RockTeam Junk
No sparkling wiggles in here, only dump truck grinches.
"Screamin Heathen"
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05-27-2024, 03:02 PM #23
Congratulations!!! you got a nice motor!!!
Serial number that starts 0G7***** Is probably a 1997 or 1998
0G3******* is a 1996. So, it has to be newer that that.
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05-27-2024, 03:39 PM #24Member
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05-27-2024, 03:42 PM #25Member
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05-27-2024, 03:42 PM #26Member
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I will get more pictures tomorrow if I need more to help y’all out.
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05-27-2024, 04:03 PM #27
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05-28-2024, 06:55 AM #28
That is what is commonly known as a Frankenmerc. Definitely a 225 Promax block but with carbs. And no fuel pump.
RockTeam Junk
No sparkling wiggles in here, only dump truck grinches.
"Screamin Heathen"
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05-28-2024, 07:05 AM #29Member
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So needs to have a electric fuel pump?
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05-28-2024, 10:16 AM #30Member
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A couple more questions should I run it with the tstats and poppet valve? I also put a different lower unit off a Mariner 150 i was wondering if that could be some of the problem? Any and all help would be appreciated.
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