It could be your mixing elbow. Remove it and see whether it's clogged. If yes, you can scrape it out, or have a radiator shop boil it out.
Alan Bergen 35 Mk III Thirsty Rose City YC Portland, OR On Sat, Aug 17, 2019 at 5:14 PM Eugene Fodor via CnC-List < cnc-list@cnc-list.com> wrote: > My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It > also appears to drift a bit while operating at a fixed throttle. Tied at > the dock forward seems to have more difficulty that reverse. I should be > able to get up to 3200-3400 RPM (and have been able to in recent times with > no issue, but I'm only getting to about 2500-2800. When I open the throttle > wide it in gear it initially goes to high RPMs and then drops back. I > replaced the fuel filter and the symptom remains the same. Any thoughts on > what to look for and approaches to debug? > > I've got the service manual and Don Casey's book on small engines, but > nothing is matching the symptoms in trouble shooting exactly well. > > So my theories are (in approximate order of suspicion from my novice > perspective based on reading) > > Governor is faulty and needs adjustment > Injector faulty > Fuel pump issue > Air/water in fuel (I think I've mostly ruled this out) > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- > https://urldefense.proofpoint.com/v2/url?u=https-3A__www.paypal.me_stumurray&d=DwICAg&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=9w3G7Cf8YfQnrjmtuNxwDJYr3JMv9f1pAfgAJ9xXYQQ&m=J7yR_wioiYdv_W5vUkFkJJXcELH0RCiI3zMJI2QdlOM&s=MzpJcmBodkNtQt6LCSMy7duJv46NR659jwqyhr-gyzo&e= > >
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