-
1993 omc 175 no fuel pump vacuum?
-
SC Club Moderator
Clogged pulse limiter possibly? Pull the hose off the pump and kill switch have someone crank the engine and check for vacuum.
-
New pulselimter….new fuel pump….all new hoses….rebuilt the vapor tank….new bulb and line.
whats next
we check the vacuum at the pulse limter… no vacuum there at all
motor runs like it alway has when you pump bulb and it’s running on all cylinders and no miss at all. All cylinders check 90 to 100
-
Remove the pulse limiter and check for blockage.
-
It’s new
It a straight hole in it
-
I was thinking more of a blockage in the block.
-
I check it tonight and it’s open also
Last edited by topwaterbullet; 08-01-2024 at 12:42 AM.
-
-
If you have no vacuum pulse or pressure pulse from the engine block/crankcase, then I would suspect bigger problems.
check the compression of the cylinders. check the reed valves.
Vacuum pulse - movement of air - occurs with the up and down movement (think air compressor) of the piston specific to the vacuum fitting. No vacuum means no air is moving with movement of the piston. No air = no compression, no power
-
100 on all cylinders
the vacuum gauge flops all over the place at idle.
there some check valves in the intake I’m goin to check that gos with those hoses that come from each cylinder to intake.
call
Recirculation system
I check all fitting on the block and there all opening so coin to take the carb and intake off to check these valves next.
motor run good till it run out of gas it idle all day long.
-
Got it out again and change fuel pump out and put number 3 on and we have 5psi at the fuel line going to carb.
-
SC Club Moderator
That is about the correct pressure on them range is between 5-7 psi.
-
5 psi it want run it. We on Pickwick last night and it still same. I’m going to put two pust and use the bottom and top vacuum to run the both and see if it helps it.
Reply With Quote