Serviced Engine (2GM20) For First Time - Problems !

[tugboat]

My primary filter is above the level of my day tank (daft- but there ya go!). Years ago a pal of mine (since deceased) used to go rallying. Built his own rally car and the fuel system incorporated an in-line electric fuel pump. I had wondered about fitting something like that next to the daytank valve. Anyone got any thoughts?

 

[oldharry]

Peugeot diesel cars have a rubber bulb apparently identical to an outboard priming bulb set up to prime the filters etc. Brilliant - I'm just about to fit one to my Bukh 20 to avoid having to spend hours fiddling with the tiny and rather inaccessible priming lever on the lift pump.

 

[nealeb]

One trick that may help fill the primary filter is to blow down the fuel tank breather to pressurise it slightly - this worked a treat on my previous boat where the tank was only slightly higher than the filter. I have always found the fuel lift pump adequate to fill the engine-mounted fuel filter but as already mentioned you do have to check that the engine has stopped in the right place to let the lever move fully. If it does not seem to be working, give the engine one full turn, or a half-turn on the starting handle on the end of the camshaft.

I usually end up using the blunt-ended screwdriver technique to slacken the filter locking ring. Horrible way to do it, but the only one that seems to work. I do usually manage to tighten it by hand, though.

Yanmar are really bad at designing accessibility into their engines, even when there is plenty of room round them to work. On the 3GM, I have to take off the fuel filter mounting to get at one of the anodes and one of the others is only just accessible. You also need a strong socket and a long bar to move them, in my experience! I cannot get the room to swing a strap or chain wrench on the oil filter but I have found tool from Draper which has three pivoted arms which go over the filter from the end. They then tighten on the filter when you turn their pivot block with a socket - works a treat in a confined space.

 

[Bilgediver]

Pressurising the fuel system will solve this...I have achieved this by just putting tight fitting plastic hose into the filler connection and blowing...Others use a dinghyy pump and slow operation.


There are 4 connections on the top of some of these filters. an inlet and outlet on each side. If these are seized then you can bleed just by slacking one of the unions, have kitchen roll available to catch the fuel.

Beware if you filter is a Volvo derivative...They use a longer filter than the bog standard so if a standard filter is used the assembly may leak or draw air duw to the screw becoming thread bound before it nips all the fitler parts tight.

The solution is to put additional white metal or fibre washers under the central bolt head.

You could of course also buy the more expensive longer filters from Volvo /forums/images/graemlins/smile.gif The differenec is only a few millimeters but it is enough!!!!!!

 

[PaulR]

2 suggestions:

1. if lift pump proving tricky try pressurising fuel tank (gently) by using dinghy pump into fuel filler - I was given this as a tip once and worked beautifully

2, my yanmar has the same engine mounted filter with the knurled securing ring-have used blunt screwdriver before but notice slight leak of fuel and have just tightened it further using strap type filter wrench-am reasured by others comments above as sounds like my very slight fuel weep may have been coming from this filter not being tight enough-will find out in next few weeks

3 I have downloaded and printed a basic yanmar manual and spent ages searching for the zincs-finally gave up and called into engine bod who smiled and explained that the freshwater called engine like mine doesn't have any zincs - no wonder I hadn't been able to find them!

good luck

 

[corncob]

When you have removed your zinc anode(s) (eventualy) coat the threads with a light coating of copper slip, this will maintain a connection with the block (allow the zinc to work) and make it eaiser to remove. officailly Yanmar state that you must check anodes every 12 months, however, from experience in some areas you will need to check it every 3 months!

Any body had problems with Mercruiser D1.7?