![]() ![]() ![]() This has happened since a few bumpy trips and the water seperator was full of black spots, probably degraded fuel. Above 4000 rpm the boat seems fuel starved and is surging, throttle off and it runs fine and at cruising speed runs like a top. I'm hoping theres an optimax guru that can help me. ![]() (California, US) My outboard is a 2000 Optimax 225 DFI.Optimax 225, 2004 surging at high revs. I haven't taken the cowl off of the engine yet. Get a great deal today on boat control cables at Great Lakes Skipper. My 2004 Merucry OptiMax 135 is not achieving full throttle. The sound spikes up again when you stop and while its idling.Mercury Optimax Throttle Body Assembly With Linkage Cables 893301T01. When the throttle is increased, it quiets down. Especially at lower RPMs (the f-n-r range). The engine is Loud: The engine can get obnoxiously loud and irritating. 6 Common Mercury OptiMax 200 Problems: 1. I've noticed that if I slide the choke 3/4's, the engine. The engine starts on first pull but surges badly at idle. Hello all, Thought I'd try to get some help on a Honda Tiller I'm working on with a GX-240 engine. 225 Mercury optimax, surges from 4500 rpm to 5000rpm Could be several things, Check fuel pressure and flow, if flow is low replace fuel filter, if pressure is low check fuel regulator, if ok replace fuel pump.At the lowest idle, it dies down and sometimes shuts off. ![]()
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