We have a Yanmar 3GM30F in our 1990 Caliber 33. After a pleasant early evening sail. We fired up the engine to motor into the inlet of our harbor and had problems with engine stalling at RPM's over 2000 and under 1000. Once I found the range she would stay running I was able to limp her into the harbor and to our mooring.
The gauge next to the Racor filter was clearly in the red. I usually have the yard spring commission the engine and the filter usually lasts through our 6 month Long Island sailing season. I've actually never had to change one myself.
I read through various diesel engine books that I have aboard including notes from a Mack Boring seminar I attended a few years back.
I removed the Racor filter and looked inside it didn't look dirty, but like I said I never changed one before. I filled the new filter and bowl with fuel right to the top. Smeared some fuel on the O-rings and hand tightened her up as the books recommended.
Then I proceeded to remove the bleed screw (phillips head) from the secondary filter. I can't believe Yanmar chose to stick the thing up under the heat exchanger
. I was able to get a wrench on it but had no room to swing the wrench. I had to remove the other screw on top of the filter to remove the bleed screw.
I operated the lift pump and was not getting any fuel out of the top of the secondary filter. I put back the outer screw and tried again, nothing. Actually I wound up with a small amount of fuel on my fingers which I was using to operate the lift pump. For those of you not familiar with a Caliber 33, starboard side excess to the engine is visually limited. I use a mechanics mirror just to put the oil dipstick back into the engine. I had to use a mirror to see the screws on the top of the secondary filter.
I replaced the bleed screw on the secondary filter and started the engine. She ran for about 2 minutes at about 1000 RPM's before she stalled. I was not able to get her to start after that. Finally I said uncle and called the mechanic where we moor our boat.
The mechanic was not able to get fuel into the secondary filter. He found that the hose running from the primary filter to the fuel pump was cracked, probably original hose. He replaced that, but still no fuel. He ordered a new pump which he is waiting for.
I didn't really delve into it any deeper because I figured I was doing something wrong. This is from someone that when my SUV doesn't run correctly I take it to my mechanic.
Depending which book you read. Some say that in most cases you only need to bleed up to the secondary filter while other books say you should bleed the whole system up to the injectors
I just haven't been able to figureout the iron Jenny
. Give me circuits, electronics, computers, and I'll make them work
. Gears, belts, and fuel lines have got my number
Thanks for your replies.
S/V Sailor Dance
1990 Caliber 33
Long Island Sound