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Mercruiser 7.4l 454 4bbl
Engine: 0D390851
Transom: 0D370469
Drive: 0D403732 -- 7.4L Bravo 88-91
The boat came with stickers attached to the stabilizer bars proclaiming 360 hp which would indicate magnum but I'd like to know for sure.
Thanks for any guidance.
Update: I used a zip tie on each end of the vacuum hose going from the vacuum break to the carb and voila. On the bright side I can do anything I need to a quadrajet, now.
Thanks for all the help narrowing this down.
Hey Bondo, thanks. I guess I don't know for sure what this engine's vacuum is supposed to read at idle, and I'm worried about the flutter in the vacuum gauge indicating an issue that I could exacerbate by continuing to run.
I guess I'm hoping for a marine-454-whisperer to either tell me the...
My Mercruiser 7.4 454 vacuum reading seems low, and the needle flutters *I think* like it has worn valve guides. It has the stock cam + stock pretty much everything else, except electric fuel pump and regulator. Engine serial# 0D390851 . Marine Quadrajet carb.
Idles pretty steady at 600 rpm...
Hi folks,
Can someone tell me which spanner I'll need to buy to remove the caps from and rebuild the trim cylinders on a Bravo One stern drive serial# 0D403732 ?
Thank you,
Ray
