JB Please help 80 Merc '83 stalls in gear

[Grant Ingle]

Here's the scoop; working on a 1983 80 HP merc with excellent compression @ 120 psi each cylinder. Have already replaced the check valves in the fuel pump and measured the vacuum at idle; it is 1-2inches of mercury. No air bubbles or anything that would stand out. We then replaced the fuel pump inlet cover; old one was plastic, new one is aluminum. No change in idling condition. Diaphragm originally equipped without a spring and plastic puck on the check valve retainer. New kit converts this pump to a spring and puck style check valve retainer. Have drawn a fuel sample, checked everything else that could impede idling characteristics and have come to the conclusion that although a problem exists, it is not related to the fuel system. <br />please let me know if you have seen this and what I need to do to correct it. Email me direct at propshop@bright.net

 

[Grant Ingle]

Re: JB Please help 80 Merc '83 stalls in gear

Also noticed in directions for fuel pump kit. It mentions using a new transfer port cover if engine falls in a certain serial number range. My engine is in this window. I'm wondering what the actual change was and why this is neccessary. also with the fuel pump off i've put my finger up to the pulse hole on the transfer port. There is a consistant pulse there with engine rotation. Merc tech services told me about this check to verify an internal crankcase leak isn't affecting fuel pump operation.

 

[JB]

Re: JB Please help 80 Merc '83 stalls in gear

Howdy, Grant.<br /><br />Mercs are not in my area of specialty, but you description of your symptoms is vague.<br /><br />Have you verified that all cylinders are making power at idle?<br /><br />What, exactly, is the problem? Stalls when put under load? Or is there more?<br /><br />Was the synch and idle adjusted under load?<br /><br />Let us know.

 

[Joe Reeves]

Re: JB Please help 80 Merc '83 stalls in gear

JB.... Please contact me via my e-mail address. Thanks. ReevesJ32@aol.com