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Forum: Engines

12-05-2020, 09:17 PM

Replies: 12

Backfiring and spluttering

Views: 2,280

Posted By mmwjr

Being that the boat sat the long the fuel may be...

Being that the boat sat the long the fuel may be bad or the pickup in the tank clogged. What year is the engine? 1998 or newer should have an electric fuel pump. Again I would verify pressure is 5-7...

Forum: Engines

12-05-2020, 12:44 PM

Replies: 12

Backfiring and spluttering

Views: 2,280

Posted By mmwjr

Verify the plug wires are in the proper firing...

Verify the plug wires are in the proper firing order.

Did this problem exist prior to changing the distributor cap? I have heard of bad Mercruiser caps. Has this engine ever ran good for you?...

Forum: Engines

12-02-2020, 11:49 AM

Replies: 12

Backfiring and spluttering

Views: 2,280

Posted By mmwjr

Welcome aboard! What ignition system do you...

Welcome aboard!

What ignition system do you have Thunderbolt IV or V? If V then did ground the purple lead as JP asked to set base timing? Did you check for signs of water in the fuel? Dump...

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