- Reaction score
Maybe:The Tohatsu 25 will idle and run perfectly with the engine cover off but as soon as I put the cover on it begins to sputter. The air intake on the cover is not blocked in any way but for some reason seems not to be letting enough air in. Any ideas?
1. The cover is somehow pinching or crimping a fuel line
2. The cover is binding against the choke linkage
3. The cover is binding against a wire or electrical connection
If the sputtering is instantaneous it may be an electrical problem. If the float bowl is full it should run alright for 5 seconds or so before starving.
Look for "shiney" spots on any fuel line or any wires that are near the cover.
With the cover off will the motor pull maximum revs under load? If so, it is likely a chafing/crimping problem rather than an air starvation problem. Does the cover distort when closing it?
Did the problem come on gradually or all at once? Was there any work done just prior to the problem?
Check the mouth of the carb for any debris that may have been sucked in there