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Hi all,
I have a 1998 200 ocean pro. It's been a great motor & has about 1200 hours on it. I started having a surging problem when I throttled up; the more load (weight, headwind) the sooner it would surge. Replaced the fuel pump (OEM) and pulse valve. Inspected and replaced all fuel lines. Inspected check valve at tank & fuel tank pickup. Replaced squeeze bulb. I should mention that I thought I'd been sold a bad new fuel pump, so the dealer graciously replaced it--so this is the 2nd brand new OEM pump. I guess next up is to check the cylinder compression, in the event that low compression is creating a "weak" fuel pump. But I've not had any performance issues that would have led me down that path previously. I just don't know what else to look at. I should also mention that I'd disconnected the fuel line directly prior to the fuel pump & the engine idled perfectly. Which led me to believe that the trouble HAD to be somewhere between that & the tank. But it seems that the simple resistance of the 6' run of fuel line and the tank check valve are enough to starve the engine. With full carbs, the idle is about 1100 RPM; as they run low, the idle drops to 800 RPM or lower. The squeeze bulb will replenish the carbs & pick up the idle for another 45 seconds or so, & then start the whole process again. Very frustrating. Thoughts? Thanks in advance!
Bret
I have a 1998 200 ocean pro. It's been a great motor & has about 1200 hours on it. I started having a surging problem when I throttled up; the more load (weight, headwind) the sooner it would surge. Replaced the fuel pump (OEM) and pulse valve. Inspected and replaced all fuel lines. Inspected check valve at tank & fuel tank pickup. Replaced squeeze bulb. I should mention that I thought I'd been sold a bad new fuel pump, so the dealer graciously replaced it--so this is the 2nd brand new OEM pump. I guess next up is to check the cylinder compression, in the event that low compression is creating a "weak" fuel pump. But I've not had any performance issues that would have led me down that path previously. I just don't know what else to look at. I should also mention that I'd disconnected the fuel line directly prior to the fuel pump & the engine idled perfectly. Which led me to believe that the trouble HAD to be somewhere between that & the tank. But it seems that the simple resistance of the 6' run of fuel line and the tank check valve are enough to starve the engine. With full carbs, the idle is about 1100 RPM; as they run low, the idle drops to 800 RPM or lower. The squeeze bulb will replenish the carbs & pick up the idle for another 45 seconds or so, & then start the whole process again. Very frustrating. Thoughts? Thanks in advance!
Bret
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