Fischan

I am looking at a boat to purchase that has these motors. Im having a really hard time finding any decent info on these motors.
Were they any good? Reliable? Valve train issues like its succesor the hp500? Any help would be greatly appreciated.

Fischan

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Fischan

mike tkach

iTrader: (3)

i think the difference is the cam&lifters,im not sure but if memory serves me correctly the 465 had flat tappet cam &lifter setup.i have never worked on any and only seen a pair of them in one boat.

Fischan

Thanks Mike. I have found some info. Just not any real world experiences or reviews like on the other motors. The boat they are in is a formula 336. Its supposed to be 100% original with low hours. Im going to inspect it tonight and will know more after i get the HIN and make a call to formula.

First bits of info point to a mk IV 502 with a flat tappet cam and dual rise intake. Searching mercruiser parts through bam point to it being a gen V 502 block. Both variations are said to have 445 hp at the prop.

Any other additions are welcomed.

vintage chromoly

iTrader: (3)

Might get lucky and find bowtie blocks.

Sydwayz

iTrader: (1)

chuckbeecher here on OSO had a 32 Active Thunder with them way back in the day.
He always said they were great motors.

US1 Fountain

iTrader: (1)

Had one in my '94 Fever.
Hyd flat tappet cam that wasn't a stranger to reversion with the OEM GIL/Merc exhaust
GM Dual plane high-rise intake with Holley 800

Other than those 2 items, same critter as the 500 which replaced the 465 in '95, at which point the cam and intake were changed. I 'think' the HP500 in '94 and previous, was actually the 540 Bulldog.

BUP

iTrader: (9)

This engine was started in 1990 thru 1992 and in 1992 (serial run) at some point was then the Gen V version thru 1994 . Mercruiser put out a SB to bump the idle up to help against water reversion. It helped somewhat but did not cure those problems completely. Back in the day we seen the 465 in Fountains quite a bit.

FIXX

iTrader: (2)

my 336 had the same engines in it ..good engines,just make sure you use good oil..gen v block..still not a speed queen with those enines..you will only see 70 with that boat..