Hello All,
I am the new owner of a 1977 Catalina 30 and have been doing a massive amount of work restoring this boat to its proper conditions as well as fine tuning what I can and eliminating all the gremlins I find hiding.
One problem that still eludes me is this atrocious RPM surging issue. The gremlin boss so to speak. I have seen it plague many other posters on here and I am joining the ranks of those who wish to find all the reasons for such a thing and attack it head on. Milkus Bilkus!!
I had the motor running perfectly without a skipped beat for a solid 13 hours yesterday motoring up the coast of Vancouver. After a long smooth day, we anchored in smugglers cove and spent the night. The next day when I went to start the engine, it sounded a little different and then when it fired up I'm now surging all over the place with my RPMS.
I am currently motoring and it sounds weak and wobbly and then occaisionaly suddenly I can hear the performance getting to where it wants to be, a nice solid strong steady rpm. It holds that steady for a few seconds and sounds great, then falls back into the surging problem. It sounds like shes trying to find that sweet spot constantly and once shes got it cant hold onto it.
I have read many threads about this but I am wondering if anyone out there has any quick Ideas. I am not in a position to take the carb apart right now and as I'm typing this it just did another cycle of strong for a few seconds and now its backing to wobbling.
I have installed new spark plugs, new cap & rotar, new water separator fuel filter (previously cleaned out the tank so I know it was a clean tank.) New fuel pump (4-5.5 PSI Facet)
Anybody got some good Ideas. I am not a mechanic but I do have some tools on board and am close to a marina. But would obviously like to figure this out with the help of other A4 owners. I am not electrically inclined at all so I don't have any testing equipment.
Thanks!!
P.S
I have been diligent with my oil changes, I use the boat alot so it has not been sitting.
I am the new owner of a 1977 Catalina 30 and have been doing a massive amount of work restoring this boat to its proper conditions as well as fine tuning what I can and eliminating all the gremlins I find hiding.
One problem that still eludes me is this atrocious RPM surging issue. The gremlin boss so to speak. I have seen it plague many other posters on here and I am joining the ranks of those who wish to find all the reasons for such a thing and attack it head on. Milkus Bilkus!!
I had the motor running perfectly without a skipped beat for a solid 13 hours yesterday motoring up the coast of Vancouver. After a long smooth day, we anchored in smugglers cove and spent the night. The next day when I went to start the engine, it sounded a little different and then when it fired up I'm now surging all over the place with my RPMS.
I am currently motoring and it sounds weak and wobbly and then occaisionaly suddenly I can hear the performance getting to where it wants to be, a nice solid strong steady rpm. It holds that steady for a few seconds and sounds great, then falls back into the surging problem. It sounds like shes trying to find that sweet spot constantly and once shes got it cant hold onto it.
I have read many threads about this but I am wondering if anyone out there has any quick Ideas. I am not in a position to take the carb apart right now and as I'm typing this it just did another cycle of strong for a few seconds and now its backing to wobbling.
I have installed new spark plugs, new cap & rotar, new water separator fuel filter (previously cleaned out the tank so I know it was a clean tank.) New fuel pump (4-5.5 PSI Facet)
Anybody got some good Ideas. I am not a mechanic but I do have some tools on board and am close to a marina. But would obviously like to figure this out with the help of other A4 owners. I am not electrically inclined at all so I don't have any testing equipment.
Thanks!!
P.S
I have been diligent with my oil changes, I use the boat alot so it has not been sitting.
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